{ "measurement": "Does plan mode pay for itself on an OPEN-ENDED task, which is the case the advice actually names", "claude_code_version": "2.1.228 (Claude Code)", "claim_under_test": "Plan mode 'is more cost-efficient than pure auto-accept on open-ended prompts', because the model 'takes more actions per task when it doesn't pause for approval, increasing both tool call count and session length'.", "companion_corpora": { "plan-mode-equal-permissions.json": "the same two arms on a SPECIFIED task, one bug with one right answer, equal tool permissions", "plan-mode-cost.json": "the first, confounded attempt at the specified task" }, "method": { "why_open_ended": "Both earlier posts named the same limit: the advice specifies 'open-ended prompts', and a task with one right answer gives planning almost no room to prevent an expensive wrong turn. Here the prompt says only that the module is not robust and to improve it. What 'robust' means, and how far to go, is the model's call.", "prompt": "config.py loads a JSON config file. It is used in production and it is not robust. Improve it. Do not change the public interface of load_config and do not edit test_config.py. Reply DONE when you are finished.", "arms": "AUTOACCEPT is one call with --permission-mode acceptEdits. PLAN_EXEC is a call with --permission-mode plan, then a second call with acceptEdits carrying the plan text. Cost for PLAN_EXEC is the SUM of both calls.", "success": "A HIDDEN rubric, applied afterwards, identically to both arms. The model never sees it, so the task stays open-ended while scoring stays objective. See rubric below.", "rubric": { "handling_9_items": "One per malformed input. An item passes if what escapes is NOT a leaky internal exception. Leaky means the failure names the implementation rather than the contract: JSONDecodeError, KeyError, TypeError, AttributeError, IndexError. Returning any value passes; so does ValueError, any OSError, or any exception class defined in the module under test, because those are deliberate failure shapes a caller can act on.", "inputs": [ "missing_file", "malformed_json", "empty_file", "missing_required_key", "wrong_type_for_port", "path_is_a_directory", "top_level_not_an_object", "port_is_null", "file_has_a_bom" ], "distinguishability_1_item": "Across the nine malformed inputs the outcomes must produce at least three distinct signatures. A blanket except returning None clears every handling item and fails this one.", "regression_1_item": "The valid config must still return exactly what the original returned. This is what punishes rewriting the contract while improving it.", "max": 11 }, "controls": { "rubric_discriminates_three_ways": "Run before any model call. The untouched module scores 5 of 11, leaving six genuine failures to fix. A blanket except returning None scores 10 and fails distinguishability. A careful implementation scores 11. Without that spread a score is not a quality signal.", "rubric_was_strengthened_once_before_the_measured_rounds": "A single smoke round was run on a 6-item version of the handling list and both arms scored full marks, so the instrument had no headroom. Three further malformed inputs (non-object top level, null port, byte-order mark) were added BEFORE any measured round, and the rubric was not touched again after the measured runs began. The smoke round is not pooled into any figure.", "permission_symmetry": "--allowedTools Bash on every call in both arms, asserted onto the command line, and proven ARRIVED rather than merely passed: every call must record at least one Bash tool use in its action record.", "action_record": "--output-format stream-json, so every tool call is captured by name and argument.", "test_integrity": "test_config.py is sha256-checksummed before and after every run.", "isolation": "--setting-sources project on every invocation, asserted.", "tokens": "modelUsage, not .usage." }, "pairing": "Every figure is computed over ROUNDS IN WHICH BOTH ARMS RAN, marked paired=true. One auto-accept run has paired=false: the harness crashed on its partner plan call, on a stream event whose message field was a string rather than an object. It is published unchanged and excluded from every median, ratio and separation claim. Seven paired rounds remain.", "redaction": "Replies are stored with every path-shaped token reduced to its basename, or to where the basename itself was identifying, and truncated to 1200 characters. Tool-call arguments over 400 characters have their paths elided rather than published as a truncation artifact. The tool NAME and the ORDER are complete for every call. No measured value is altered by any of this.", "known_limits": { "exit_plan_mode_was_unavailable_in_every_run": "ExitPlanMode, plan mode's own handoff, was not in the tool set on any of the 7 paired plan calls. 5 of the 7 plan replies say so outright, all 7 spent at least one ToolSearch hunting for it (10 in the corpus, every one inside a plan call, none in the auto-accept arm), and all 7 fell back to writing the plan to a file. That workaround is a property of this headless setup, not of planning, and it is charged to the plan arm. Within this corpus an extra plan-phase tool call costs about 30,473 tokens and $0.0616, so removing one from every plan call takes the median workflow from $0.6600 to $0.5984 and the dollar ratio from 2.27x to 2.06x; dropping the dead turns takes the turn ratio from 2.14x to 1.86x and tool calls from 2.17x to 1.83x. Every separation survives, so the published ratios are upper bounds rather than wrong. The same artifact is present in plan-mode-equal-permissions.json, so the comparison between the two corpora is not distorted by it.", "the_execute_call_inherited_nothing_here": "The per-call comparison against the specified-task corpus turns on this and it is visible in the action records. There, 6 of 8 plan calls ran the failing suite before proposing, and 8 of 8 execute calls then skipped discovery, starting at Read. Here 0 of 7 plan calls ran the suite; every non-ls command in the plan phase is an interpreter or pytest version probe, and 7 of 7 execute calls re-ran ls -la and re-read both config.py and test_config.py. So a share of the collapse in the execute-call saving is that inherited diagnosis disappearing, not planning ceasing to reduce work.", "rubric_ceiling": "All 15 runs scored 11 of 11. This corpus therefore contains a floor on quality, not a quality comparison. The three-way control shows the rubric would have caught a broken or blanket-except implementation from either arm; it cannot rank two implementations that both clear it." } }, "rubric_control": { "untouched": { "score": 5, "max": 11, "distinguishable": true, "regression_ok": true }, "blanket_except_returns_none": { "score": 10, "max": 11, "distinguishable": false, "regression_ok": true }, "careful": { "score": 11, "max": 11, "distinguishable": true, "regression_ok": true } }, "runs": [ { "arm": "autoaccept", "round": 0, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: config file not found: 'measured/autoaccept_0/__no_such_file__.json'", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/bad.json' is not valid JSON: Expecting value: line 1 column 10 (c", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/empty.json' is not valid JSON: Expecting value: line 1 column 1 (", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/nokey.json' is missing required field 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/badport.json': 'port' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: config path is a directory: 'measured/autoaccept_0/adir'", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/list.json' must contain a JSON object at the top level, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/nullport.json': 'port' must be an integer, got None", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_0/bom.json' is not valid JSON: Unexpected UTF-8 BOM (decode using u", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 147, "calls": [ { "phase": "execute", "context": 144980, "output": 4134, "turns": 7, "cost": 0.27960749999999995, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_0" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\ndef w(obj, raw=None):\n p = tempfile.mktemp(suffix=\".json\")\n with open(p, \"w\") as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ncases = [\n (\"valid\", w({\"host\":\" example \",\"port\":8080})),\n (\"port str\", w({\"host\":\"h\",\"port\":\" 8080 \",\"debug\":\"FALSE\"})),\n (\"port float\" " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All behaviors verified. `load_config(path)` keeps its signature and return shape; the existing test passes unchanged.\n\nWhat changed in `config.py`:\n\n- **Single error type** — every failure raises `ConfigError` with a message naming the file and field, instead of leaking `OSError` `JSONDecodeError` `KeyError` `ValueError` from four different layers.\n- **File-level handling** — missing file, directory, permission denied, non-UTF-8, and other `OSError`s; the file is now opened with an explicit `encoding=\"utf-8\"` rather than the platform default.\n- **Non-object JSON** — `[1,2]` or `\"str\"` used to crash with a confusing `TypeError`; now rejected explicitly.\n- **`host`** — must be a present, non-empty string, and is stripped. Previously any JSON value passed through, so `host: 5` or `host: null` reached production untouched.\n- **`port`** — accepts int, numeric string, and integral float (`8080.0`), rejects `true` (which `int()` silently turned into `1`), non-integral floats, and anything outside 1–65535.\n- **`debug`** — real boolean parsing. The old `bool(...)` read `\"false\"` as **True**, which is the kind of thing that ships debug mode to production; strings now map through an exp" } ], "total_context": 144980, "total_output": 4134, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 3, "total_cost": 0.279607, "wall": 56.0, "batch": "batch1", "paired": true }, { "arm": "plan_exec", "round": 0, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/__no_such_file__.json: config file not found", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/bad.json: invalid JSON at line 1 column 10: Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/empty.json: invalid JSON at line 1 column 1: Expecting value", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/nokey.json: host: required field is missing", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/badport.json: port: expected an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/adir: expected a config file but found a directory", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/list.json: expected a JSON object at the top level, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_0/nullport.json: port: expected an integer, got NoneType", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "return", "detail": "{'host': 'h', 'port': 1, 'debug': False}", "exc": null } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 130, "calls": [ { "phase": "plan", "context": 127942, "output": 4099, "turns": 6, "cost": 0.276693, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_0" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 5, "n_bash": 1, "reply": "The plan is written to ``.\n\n**Summary of what I found in `config.py:1-11`:**\n\nThe most serious issue is `bool(data.get(\"debug\", False))` — a config with `\"debug\": \"false\"` evaluates to **`True`**, silently enabling debug mode in production. Beyond that: `open(path)` uses locale encoding rather than UTF-8; a missing file, malformed JSON, a non-object top level, or a missing `host` all raise bare exceptions that never name the file or the field; `int(data[\"port\"])` accepts `true` as `1`, truncates `8080.9` to `8080`, and permits out-of-range values like `0` and `99999`.\n\n**Planned fix** (all in `config.py`, signature and return shape unchanged so `test_config.py` passes as-is): a `ConfigError(ValueError)` raised for every failure with `: : ` messages and the original exception chained; BOM-tolerant reading; and one small validator per field — `host` must be a non-empty string, `port` must be an int or numeric string in 1–65535 with `bool` and fractional floats rejected, and `debug` accepts real booleans, ``, and case-insensitive `\"\"` while raising on anything else instead of falling back to truthiness.\n\nOne " }, { "phase": "execute", "context": 149523, "output": 4798, "turns": 7, "cost": 0.29036799999999996, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_0" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, os, tempfile\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(obj, raw=None, name=\"c.json\", enc=\"utf-8\"):\n p = os.path.join(d, name)\n with open(p, \"w\", encoding=enc) as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\nok = [\n ({\"host\":\"example\",\"port\":\"8080\",\"debug\":True}, {\"host\":\"example\",\"port\":8080,\"d " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All edge cases behave as intended and `test_config.py` passes unmodified.\n\n**What changed in `config.py`** (signature and return shape unchanged):\n\n- **`ConfigError(ValueError)`** — every failure raises it with a `: : ` message and the original exception chained. Subclassing `ValueError` keeps callers that caught the old `int()` failures working.\n- **Reading** — UTF-8 with BOM tolerance (`utf-8-sig`) instead of locale encoding; missing file, directory-in-place-of-file, permission denied, non-UTF-8 bytes, malformed JSON (reported with column), and a non-object top level each get their own named error.\n- **`host`** — must be present and a non-empty string; surrounding whitespace is stripped.\n- **`port`** — accepts an int, a whole-valued float, or a numeric string; rejects `bool` (so `true` no longer becomes port 1), fractional floats like `8080.9`, and anything outside 1–65535.\n- **`debug`** — the real fix for the worst bug: `\"false\"` used to evaluate to `True` under `bool()`. Now accepts real booleans, ``, and case-insensitive `off`, and raises on anything else rather than silently falling back to truthiness. A missing key still d" } ], "total_context": 277465, "total_output": 8897, "total_turns": 13, "total_tool_calls": 11, "total_bash_calls": 4, "total_cost": 0.567061, "wall": 122.3, "batch": "batch1", "paired": true }, { "arm": "autoaccept", "round": 1, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/__no_such_file__.json: config file not found", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/bad.json: invalid JSON at line 1 column 10 (Expecting value)", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/empty.json: config file is empty", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/nokey.json: missing required config key 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/badport.json: invalid value for 'port': expected an integer (got str 'not-a-nu", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/adir: config path is a directory", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/list.json: config must be a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured/autoaccept_1/nullport.json: invalid value for 'port': expected an integer (got null None)", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "return", "detail": "{'host': 'h', 'port': 1, 'debug': False}", "exc": null } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 187, "calls": [ { "phase": "execute", "context": 212012, "output": 7103, "turns": 9, "cost": 0.42570299999999994, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_1" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, os, tempfile\nfrom pathlib import Path\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(name, content, mode=\"w\", **kw):\n p = os.path.join(d, name)\n with open(p, mode, **kw) as f: f.write(content)\n return p\n\ncases = [\n (\"valid\", w(\"a.json\", '{\"host\":\"example\",\"port\":\"8080\",\"debug\":true}')),\n (\"bom + Path\", Path(w " }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -3\npython3 - <<'EOF'\nfrom config import load_config, ConfigError\nfor p in (None, 12345, 1, True, try:\n load_config(p)\n print(\"!! NO RAISE\", repr(p))\n except ConfigError as e:\n print(\"err ->\", e)\nEOF" } ], "n_tool_calls": 8, "n_bash": 4, "reply": "`config.py` rewritten; the existing test still passes, and `test_config.py` is untouched.\n\n`load_config(path)` keeps its signature and still returns `{\"host\": str, \"port\": int, \"debug\": bool}`. What changed:\n\n- **Every failure is now one exception type** — `ConfigError` (subclass of `ValueError`, so callers already catching the `ValueError` from `JSON keep working). Messages always name the file and the offending field, e.g. `c.json: invalid value for 'port': must be between 1 and 65535 (got int 99999)`. Missing file, directory-as-path, permission denied, empty file, bad UTF-8, malformed JSON (with column), and non-path arguments are all covered instead of leaking `` tracebacks.\n- **Fixed a real production bug**: `bool(data.get(\"debug\", False))` made `\"debug\": \"false\"` evaluate to **True**. Booleans now accept real JSON booleans and the common string spellings (`0`, case-insensitive), and reject anything ambiguous.\n- **`port` validated, not just cast**: rejects `true` (previously `int(True)` → 1), lists, and non-numeric strings; accepts integral floats like `8080.0` but not `8080.5`; enforces the 1–65535 ran" } ], "total_context": 212012, "total_output": 7103, "total_turns": 9, "total_tool_calls": 8, "total_bash_calls": 4, "total_cost": 0.425703, "wall": 105.1, "batch": "batch1", "paired": true }, { "arm": "plan_exec", "round": 1, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/__no_such_file__.json: config file not found", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/bad.json: config file is not valid JSON: Expecting value (line 1, column 10)", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/empty.json: config file is not valid JSON: Expecting value (line 1, column 1)", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/nokey.json: missing required config key(s): 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/badport.json: 'port' must be a number, got 'not-a-number' (str)", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/adir: is a directory, not a config file", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/list.json: config file must contain a JSON object, got [1, 2, 3] (list)", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_1/nullport.json: 'port' must be a number, got None (NoneType)", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "return", "detail": "{'host': 'h', 'port': 1, 'debug': False}", "exc": null } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 185, "calls": [ { "phase": "plan", "context": 184332, "output": 6486, "turns": 8, "cost": 0.3856225, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_1" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Bash", "arg": "python3 --version && python3 -c \"import pytest; print(pytest.__version__)\" 2>&1 | tail -1; ls -a .." }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nprint(bool(\"false\"), int(True), int(3.9), repr(bool(None)))\ntry: int(None)\nexcept Exception as e: print(type(e).__name__, e)\nEOF" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 7, "n_bash": 3, "reply": "I've written the plan to ``. Summary:\n\n**What's actually broken** (verified against Python 3.9 here, not guessed):\n- `bool(\"false\")` → `True` — a config saying debug is off turns it **on**\n- `int(True)` → port `1`; `int(3.9)` → port `3` (silent truncation); no range check, so `-1` and `99999` are accepted and fail later at bind time\n- `data[\"host\"]` passes through `123` or `\"\"` unvalidated\n- Missing keys, malformed JSON, and a non-object top level all raise bare `` with **no file path** in the message\n- `open()` uses the platform default encoding\n- A typo'd key (`\"hsot\"`) is invisible\n\n**The fix**: rewrite `config.py` around a `ConfigError` whose messages always name the path and field; explicit `utf-8-sig` read; reject `bool` before the `int` check; accept int integral float digit-string for `port` (keeping the existing test's `\"8080\"` working) with a 1–65535 range check; parse `debug` from real booleans, ``, and `off` strings instead of truthiness-casting; collect *all* missing keys into one message; `logging.warning` on unknown keys. Plus a new `test_config_robustness.py` — `test_config.py` " }, { "phase": "execute", "context": 155907, "output": 7872, "turns": 7, "cost": 0.3811175, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_1" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Write", "arg": "test_config_robustness.py" }, { "tool": "Bash", "arg": "python3 -m pytest -q 2>&1 | tail -30" } ], "n_tool_calls": 6, "n_bash": 2, "reply": "All 70 tests pass, including the untouched `test_config.py`.\n\n## What changed\n\n`config.py` is rewritten around a `ConfigError(ValueError)` whose messages always name the file path and the offending field. `load_config(path)` still takes a path and still returns `{\"host\", \"port\", \"debug\"}` — subclassing `ValueError` keeps callers that caught the old `int()` failure working.\n\nThe real bugs, fixed:\n\n- **`bool(\"false\")` → `True`.** A config saying debug was off turned it **on**. `debug` is now parsed: real booleans, ``, and `off` strings (case- and whitespace-insensitive). Anything else — `\"maybe\"`, `2`, `[]` — is an error rather than a guess.\n- **`int(True)` → port 1**, `int(3.9)` → port 3. `bool` is now rejected before the `int` check, and fractional floats are rejected instead of truncated. `port` accepts ints, integral floats, and digit strings (so the existing `\"8080\"` test keeps passing) and is range-checked to 1–65535, so `-1` and `99999` fail at load with a clear message instead of at bind time.\n- **`host` passed through unvalidated** — `123` or `\"\"` sailed through. Now must be a non-empty string; it's stripped.\n- **Bare `KeyError` `JSONDecodeError` " } ], "total_context": 340239, "total_output": 14358, "total_turns": 15, "total_tool_calls": 13, "total_bash_calls": 5, "total_cost": 0.76674, "wall": 195.4, "batch": "batch1", "paired": true }, { "arm": "autoaccept", "round": 2, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: config file not found: measured/autoaccept_2/__no_such_file__.json", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: config file measured/autoaccept_2/bad.json is not valid JSON (line 1, column 10): Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: config file measured/autoaccept_2/empty.json is not valid JSON (line 1, column 1): Expecting value", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: config file measured/autoaccept_2/nokey.json is missing required key(s): host", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: \"port\" is not a valid integer: 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: config path is a directory: measured/autoaccept_2/adir", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: config file measured/autoaccept_2/list.json must contain a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: \"port\" must be an integer, got NoneType", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: config file measured/autoaccept_2/bom.json is not valid JSON (line 1, column 1): Unexpected UTF-8 BO", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 137, "calls": [ { "phase": "execute", "context": 145157, "output": 4264, "turns": 7, "cost": 0.279714, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_2" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\ndef t(content, raw=False):\n p = os.path.join(tempfile.mkdtemp(), \"c.json\")\n with open(p, \"w\") as f:\n f.write(content if raw else json.dumps(content))\n try:\n print(\"OK \", load_config(p))\n except ConfigError as e:\n print(\"ERR \", e.__class__.__name__, \"-\", str(e).replace(p, \"" } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All paths behave as intended; the existing test passes unchanged.\n\nWhat changed in `config.py:1`:\n\n- **Single error type.** Every failure now raises `ConfigError` with a message naming the file and the offending key, instead of leaking `FileNotFoundError` `KeyError` bare `ValueError: invalid literal for int()`. It subclasses `ValueError` so callers already catching that from the old `int()` coercion still work — callers catching `FileNotFoundError` or `KeyError` do not, which is the one migration point worth knowing about.\n- **File and JSON handling.** Explicit UTF-8, and distinct messages for missing file, directory, permission denied, other OS errors, bad encoding, and malformed JSON (with column). A non-object JSON root (e.g. a list) is rejected rather than blowing up on subscripting.\n- **`port`.** Accepts int, integral float, or numeric string; rejects `bool` (previously `true` silently became port 1), fractional floats, and anything outside 1–65535.\n- **`debug`.** No longer truthiness-based — `\"false\"`, `\"off\"`, `\"no\"`, `\"0\"` now mean *off*. Previously `bool(\"false\")` was `True`, so a config explicitly disabling debug turned it on in production. That's the most conseq" } ], "total_context": 145157, "total_output": 4264, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 3, "total_cost": 0.279714, "wall": 55.1, "batch": "batch1", "paired": true }, { "arm": "plan_exec", "round": 2, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "FileNotFoundError: [Errno 2] No such file or directory: 'measured/plan_exec_2/__no_such_file__.json'", "exc": "FileNotFoundError", "custom": false }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/bad.json: invalid JSON at line 1, column 10: Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/empty.json: invalid JSON at line 1, column 1: Expecting value", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/nokey.json: missing required key 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/badport.json: 'port' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "IsADirectoryError: [Errno 21] Is a directory: 'measured/plan_exec_2/adir'", "exc": "IsADirectoryError", "custom": false }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/list.json: config must be a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/nullport.json: 'port' must be an integer, got null", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: measured/plan_exec_2/bom.json: invalid JSON at line 1, column 1: Unexpected UTF-8 BOM (decode using ", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 155, "calls": [ { "phase": "plan", "context": 128712, "output": 4757, "turns": 6, "cost": 0.2968615, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_2" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 5, "n_bash": 1, "reply": "The `ExitPlanMode` tool isn't available in this session, so here's the plan for approval directly. It's written to ``.\n\n## What's wrong today\n\n`config.py` is 11 lines with no validation. The two failures that matter most are **silent**, not loud:\n\n- `\"debug\": \"false\"` → `bool(\"false\")` is `True`. Production runs with debug on.\n- `\"port\": true` → `int(True)` is `1`. Binds the wrong port.\n\nThe rest are loud but opaque: a missing `host` gives a bare `KeyError: 'host'`, a top-level JSON array gives `TypeError: list indices must be integers`, and none of the messages name the config file. `open(path)` also uses the locale default encoding, so parsing is machine-dependent.\n\n## The change\n\nAll in `config.py`; `test_config.py` untouched and passing.\n\n1. **`ConfigError(ValueError)`** for every content problem — bad JSON, wrong top-level shape, missing key, bad value — each message naming the path and key. Subclassing `ValueError` keeps existing `except ValueError` handlers working.\n2. O stays `OSError`** so `except FileNotFoundError` and retry logic keep working; only `JSONDecodeError` and `UnicodeDecodeError` get wrapped (with column, chained via `from exc`).\n" }, { "phase": "execute", "context": 148139, "output": 4626, "turns": 7, "cost": 0.26912149999999996, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_2" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'PY'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\ndef check(label, content, raw=False):\n p = os.path.join(tempfile.mkdtemp(), \"c.json\")\n with open(p, \"wb\") as f:\n f.write(content if raw else json.dumps(content).encode())\n try:\n print(\"%-28s -> OK %s\" % (label, load_config(p)))\n except Exception as e:\n print(\"%-28s -> %s: %s\" % " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "Everything in the plan is implemented and verified. Summary:\n\n**`config.py`** — same public interface (`load_config(path)` → dict with ``), plus a new `ConfigError`.\n\nThe two silent failures are now loud:\n- `\"debug\": \"false\"` returned `True` before; it now returns `False`. Bare `bool()` is gone — booleans-as-strings are parsed (`1` and `0`, case-insensitive), and anything else raises rather than defaulting to on.\n- `\"port\": true` returned `1` before; it now raises. `bool` is checked before `int` since `isinstance(True, int)` is `True`.\n\nThe loud-but-opaque cases now name the file and the key: missing `host`, a top-level JSON array, malformed JSON (with column), and non-UTF-8 bytes. `open()` is pinned to `encoding=\"utf-8\"` so parsing no longer depends on the machine's locale.\n\nAdded validation beyond the two bugs: `host` must be a non-empty string (trimmed), `port` must land in 1–65535, floats rejected for `port` since `8080.5` has no sane truncation.\n\n**Exception contract**, chosen so existing callers keep working:\n- `ConfigError` subclasses `ValueError`, so a legacy `except ValueError` around a bad port still catches it.\n- O failu" } ], "total_context": 276851, "total_output": 9383, "total_turns": 13, "total_tool_calls": 11, "total_bash_calls": 4, "total_cost": 0.565983, "wall": 132.9, "batch": "batch1", "paired": true }, { "arm": "autoaccept", "round": 3, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: config file not found: 'measured/autoaccept_3/__no_such_file__.json'", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_3/bad.json' is not valid JSON (line 1, column 10): Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: config file is empty: 'measured/autoaccept_3/empty.json'", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: missing required config key 'host' in 'measured/autoaccept_3/nokey.json'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: config key 'port' in 'measured/autoaccept_3/badport.json' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: config path is a directory: 'measured/autoaccept_3/adir'", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_3/list.json' must contain a JSON object at the top level, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: config key 'port' in 'measured/autoaccept_3/nullport.json' must not be null", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: config file 'measured/autoaccept_3/bom.json' is not valid JSON (line 1, column 1): Unexpected UTF-8 ", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 173, "calls": [ { "phase": "execute", "context": 148589, "output": 5655, "turns": 7, "cost": 0.337715, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_3" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, os, tempfile\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(obj, raw=None, name=\"c.json\"):\n p = os.path.join(d, name)\n with open(p, \"w\") as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ndef show(label, path):\n try:\n print(\"OK \", label, \"->\", load_config(path))\n except ConfigError as e:\n " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "`config.py` is rewritten. What changed:\n\n**Errors are now actionable.** Everything raises `ConfigError` (a `ValueError` subclass, so callers already catching the old `` failures keep working) with a message naming both the file and the offending key. Previously a missing key gave a bare `KeyError: 'host'` and a non-object top-level gave a confusing `TypeError`.\n\n**Failures now handled explicitly:** missing file, path-is-a-directory, permission denied, other `OSError`, empty file, malformed JSON (reported with column), and top-level JSON that isn't an object.\n\n**Value validation:**\n- `host` — must be a non-empty string; whitespace-trimmed. Was passed through unchecked, so `\"host\": 5` or `\"\"` would boot the service with a garbage bind address.\n- `port` — accepts int, integral float, or numeric string; rejects bools (`\"port\": true` was silently becoming port 1, since `bool` subclasses `int`), non-integral floats, and junk strings; range-checked to 1–65535.\n- `debug` — accepts real booleans, ``, and string spellings (`\"). The old `bool(...)` made `\"debug\": \"false\"` evaluate to **True**, which is the kind of thing that turns o" } ], "total_context": 148589, "total_output": 5655, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 3, "total_cost": 0.337715, "wall": 77.9, "batch": "batch1", "paired": false }, { "arm": "autoaccept", "round": 0, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "FileNotFoundError: [Errno 2] No such file or directory: 'measured2/autoaccept_0/__no_such_file__.json'", "exc": "FileNotFoundError", "custom": false }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/bad.json: invalid JSON at line 1 column 10: Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/empty.json: invalid JSON at line 1 column 1: Expecting value", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/nokey.json: missing required key 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/badport.json: 'port' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "IsADirectoryError: [Errno 21] Is a directory: 'measured2/autoaccept_0/adir'", "exc": "IsADirectoryError", "custom": false }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/list.json: config must be a JSON object, got array", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/nullport.json: 'port' must be an integer, got null", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: measured2/autoaccept_0/bom.json: invalid JSON at line 1 column 1: Unexpected UTF-8 BOM (decode using", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 141, "calls": [ { "phase": "execute", "context": 146179, "output": 4548, "turns": 7, "cost": 0.29103, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_0" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\ndef w(text):\n fd, p = tempfile.mkstemp(suffix=\".json\"); os.close(fd)\n open(p, \"w\").write(text); return p\n\ncases = [\n '{\"host\":\"example\",\"port\":\"8080\",\"debug\":true}',\n '{\"host\":\" example \",\"port\":8080}',\n '{\"host\":\"h\",\"port\":8080,\"debug\":\"false\"}',\n '{\"host\":\"h\",\"port\":8080,\"debug\":\"TRUE\"}',\n " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "`config.py` rewritten; the existing test passes unchanged and `load_config(path)` still returns the same three-key dict.\n\nWhat it now handles:\n\n- **Malformed JSON non-object roots** — previously a raw `JSONDecodeError` or a confusing `TypeError`; now a `ConfigError` naming the file, line and column.\n- **Missing keys** — `KeyError('host')` became `missing required key 'host'` with the path.\n- **`debug` truthiness bug** — `bool(data.get(\"debug\"))` turned `\"false\"`, `\"no\"`, and `[]`-ish junk into surprising values (`bool(\"false\")` is `True`). Strings are now parsed as flags (`0`, case-insensitive), and anything else is rejected instead of silently enabling debug in production.\n- **`port`** — accepts ints and numeric strings, rejects `true` (which `int()` happily accepted as `1`, since `bool` subclasses `int`), and range-checks 1–65535.\n- **`host`** — must be a non-empty string; whitespace is stripped.\n- **Encoding** — file is read as UTF-8 explicitly rather than depending on the platform locale, and a decode failure is reported clearly.\n\nInterface notes: content errors raise `ConfigError`, which subclasses `ValueError`, so callers already catching `ValueEr" } ], "total_context": 146179, "total_output": 4548, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 3, "total_cost": 0.29103, "wall": 60.5, "batch": "batch2", "paired": true }, { "arm": "plan_exec", "round": 0, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "FileNotFoundError: [Errno 2] No such file or directory: 'measured2/plan_exec_0/__no_such_file__.json'", "exc": "FileNotFoundError", "custom": false }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/bad.json: invalid JSON: Expecting value: line 1 column 10 (char 9)", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/empty.json: invalid JSON: Expecting value: line 1 column 1 (char 0)", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/nokey.json: missing required key 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/badport.json: 'port' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "IsADirectoryError: [Errno 21] Is a directory: 'measured2/plan_exec_0/adir'", "exc": "IsADirectoryError", "custom": false }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/list.json: config must be a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/nullport.json: 'port' must be an integer, got None", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_0/bom.json: invalid JSON: Unexpected UTF-8 BOM (decode using utf-8-sig): line 1 ", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 97, "calls": [ { "phase": "plan", "context": 130287, "output": 5451, "turns": 6, "cost": 0.322923, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_0" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 5, "n_bash": 1, "reply": "Plan mode is active, so I've written the plan rather than editing `config.py`. `ExitPlanMode` isn't available in this session, so here's the plan for approval:\n\n**Plan file:** ``\n\n**The core changes to `config.py`:**\n\n1. **`ConfigError(ValueError)`** for content problems — every message names the file and the offending key. Subclassing `ValueError` keeps existing `except ValueError` call sites working. File-level `OSError`s (missing, permissions) propagate unwrapped so callers can still catch `FileNotFoundError` to fall back to defaults.\n\n2. **`debug` parsing is the real bug fix.** `bool(\"false\")` is `True` today — a JSON config with `\"debug\": \"false\"` silently enables debug in production. Replace with an explicit accept-list: real bools, ``, and case-insensitive `on` vs `off`. Anything else errors rather than guessing.\n\n3. **`port`**: reject `bool` before `int` (`int(True) == 1` currently slips through as a port), accept int or digit-string (the existing test passes `\"8080\"` as a string, so that must keep working), then range-check `1–65535`.\n\n4. **`host`**: must be a non-empty string. No `str()` coercion — that's how `None` becomes " }, { "phase": "execute", "context": 174784, "output": 4282, "turns": 8, "cost": 0.28100600000000003, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_0" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'PY'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\ndef w(obj, raw=None):\n p = os.path.join(tempfile.mkdtemp(), \"c.json\")\n with open(p, \"w\") as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ndef check(label, obj=None, raw=None):\n try:\n print(\"%-34s -> %r\" % (label, load_config(w(obj, raw))))\n except Exception as " } ], "n_tool_calls": 7, "n_bash": 3, "reply": "All behaviors match the plan. `config.py` now:\n\n- **`ConfigError(ValueError)`** — every message names the file and the offending key. `except ValueError` call sites keep working; `` propagate unwrapped.\n- **`debug`** — the real bug: `bool(\"false\")` was `True`, silently enabling debug in production. Now an explicit accept-list (real bools, ``, and `on` vs `off`, case-insensitive); anything else errors instead of guessing.\n- **`port`** — `bool` rejected before `int` (`int(True) == 1` used to slip through), int or numeric string accepted (`\"8080\"` still works), range-checked `1–65535`.\n- **`host`** — must be a non-empty string, no `str()` coercion, so `None` can't become `\"None\"`.\n- Malformed JSON and non-object top-levels are caught and reported with the path; file opened as UTF-8.\n\nExisting test passes unchanged; `test_config.py` untouched and `load_config(path)` keeps its signature and return shape.\n\nOne judgment call worth flagging: a missing `` now raises `ConfigError` rather than `KeyError`. That's the plan's \"name the offending key\" behavior, but if any caller catches `KeyError` to fall back to defaults, i" } ], "total_context": 305071, "total_output": 9733, "total_turns": 14, "total_tool_calls": 12, "total_bash_calls": 4, "total_cost": 0.603929, "wall": 132.6, "batch": "batch2", "paired": true }, { "arm": "autoaccept", "round": 1, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: config file not found: measured2/autoaccept_1/__no_such_file__.json", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: config file measured2/autoaccept_1/bad.json is not valid JSON (line 1, column 10): Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: config file measured2/autoaccept_1/empty.json is not valid JSON (line 1, column 1): Expecting value", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: missing required key \"host\" in measured2/autoaccept_1/nokey.json", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: \"port\" in measured2/autoaccept_1/badport.json must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: config path is a directory: measured2/autoaccept_1/adir", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: config file measured2/autoaccept_1/list.json must contain a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: \"port\" in measured2/autoaccept_1/nullport.json must be an integer, got None", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: config file measured2/autoaccept_1/bom.json is not valid JSON (line 1, column 1): Unexpected UTF-8 B", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 148, "calls": [ { "phase": "execute", "context": 146410, "output": 4778, "turns": 7, "cost": 0.295612, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_1" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Write", "arg": "test_config_validation.py" }, { "tool": "Bash", "arg": "python3 -m pytest -q 2>&1 | tail -20" } ], "n_tool_calls": 6, "n_bash": 2, "reply": "All 23 tests pass (the original `test_config.py` unchanged, plus 22 new validation tests in `test_config_validation.py`).\n\nWhat changed in `config.py`:\n- **`ConfigError`** (subclasses `ValueError` so existing `except ValueError` callers still work) replaces raw `` leaks. Every message names the file and the offending key.\n- **File : explicit UTF-8, and distinct messages for missing file, directory, permission denied, bad encoding, other `OSError`.\n- **JSON**: parse errors report column; a non-object root (list, string, `null`) is rejected instead of blowing up with `TypeError` on subscript.\n- **`host`**: must be a non-empty string, whitespace-stripped. Previously an int host or `\"\"` passed straight through.\n- **`port`**: accepts int, numeric string, or integral float; rejects bools (`True` used to become port 1), fractional floats, and anything outside 1–65535.\n- **`debug`**: `bool(...)` meant `\"false\"` and `\"no\"` evaluated to `True`. Now booleans pass through, common string forms and 1 are parsed, and anything else is an error rather than a silent truthiness accident.\n\nPublic interface is unchanged: `load_config(path)` r" } ], "total_context": 146410, "total_output": 4778, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 2, "total_cost": 0.295612, "wall": 64.5, "batch": "batch2", "paired": true }, { "arm": "plan_exec", "round": 1, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "FileNotFoundError: [Errno 2] No such file or directory: 'measured2/plan_exec_1/__no_such_file__.json'", "exc": "FileNotFoundError", "custom": false }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_1/bad.json: invalid JSON: Expecting value: line 1 column 10 (char 9)", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_1/empty.json: invalid JSON: Expecting value: line 1 column 1 (char 0)", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_1/nokey.json: 'host': required field is missing", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_1/badport.json: 'port': expected an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "IsADirectoryError: [Errno 21] Is a directory: 'measured2/plan_exec_1/adir'", "exc": "IsADirectoryError", "custom": false }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_1/list.json: expected a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_1/nullport.json: 'port': expected an integer, got NoneType", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "return", "detail": "{'host': 'h', 'port': 1, 'debug': False}", "exc": null } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 130, "calls": [ { "phase": "plan", "context": 193890, "output": 5505, "turns": 8, "cost": 0.44623799999999997, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_1" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Bash", "arg": "python3 --version && python3 -c \"import pytest; print('pytest', pytest.__version__)\" 2>&1 | tail -1" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 7, "n_bash": 2, "reply": "I read both files directly — they're 11 and 11 lines, fully self-contained, so no search was needed. Plan mode is active, so I've written the plan rather than editing `config.py`. Note that `ExitPlanMode` isn't available in this session, so I can't formally exit — approve and I'll implement.\n\nPlan: ``\n\n**The problems I found in `config.py:4-11`:**\n\nThe one that actually bites in production: `bool(data.get(\"debug\", False))` means `{\"debug\": \"false\"}` evaluates to `True` — debug mode silently turns on. Same class of bug in `int(data[\"port\"])`: `true` becomes port `1`, `80.7` truncates to `80`, and `99999` is accepted with no range check. Everything else is diagnostics — a missing `host` raises a bare `KeyError: 'host'` with no mention of which file, malformed JSON raises `JSONDecodeError` with no path, a top-level JSON array raises a confusing `TypeError`, and `open(path)` uses the locale encoding rather than UTF-8 (so a BOM or non-ASCII host can mis-decode).\n\n**The fix:** a `ConfigError(ValueError)` whose messages always name the file and field, plus `_parse_host` `_parse_port` `_parse_debug` helpers that validate rather than coerce-and-hope. `debug` accepts" }, { "phase": "execute", "context": 149618, "output": 4814, "turns": 7, "cost": 0.2832535, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_1" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'PY'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\ndef w(obj, raw=None, enc=\"utf-8\"):\n p = os.path.join(tempfile.mkdtemp(), \"c.json\")\n with open(p, \"w\", encoding=enc) as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ndef show(label, obj=None, raw=None, enc=\"utf-8\"):\n try:\n print(f\"{label:38} -> {load_config(w(obj, " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All 18 edge cases behave as designed, and the existing test still passes untouched.\n\n**`config.py` rewritten** — `load_config(path)` keeps its exact signature and return shape (` **`debug` no longer coerces via `bool()`** — `{\"debug\": \"false\"}` returned `True` before, silently enabling debug mode in production. Now `\"\"` (any case, whitespace-tolerant) → `False`, the true-ish spellings → `True`, anything else is an error rather than a guess.\n- **`port` is validated, not `int()`-ed** — `true` no longer becomes port 1 (bool is checked before int, since `bool` subclasses `int`), `80.7` is rejected instead of truncating to 80, `8080.0` is accepted as integral, and the range is enforced at 1–65535 so `99999` and `0` fail loudly. Numeric strings still work, which the existing test depends on.\n- **Every error names the file and field** — `c.json: 'host': required field is missing` instead of a bare `KeyError: 'host'`; malformed JSON and a top-level array now report the path too.\n- **`encoding=\"utf-8-sig\"`** replaces locale-dependent `open()`, so a BOM or non-ASCII host decodes correctly regardless of the machine.\n\nTwo intentional behavi" } ], "total_context": 343508, "total_output": 10319, "total_turns": 15, "total_tool_calls": 13, "total_bash_calls": 5, "total_cost": 0.729491, "wall": 142.8, "batch": "batch2", "paired": true }, { "arm": "autoaccept", "round": 2, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: config file not found: 'measured2/autoaccept_2/__no_such_file__.json'", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/bad.json' is not valid JSON: Expecting value: line 1 column 10 (", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/empty.json' is not valid JSON: Expecting value: line 1 column 1 ", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/nokey.json' is missing required key 'host'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/badport.json': 'port' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: config path is a directory: 'measured2/autoaccept_2/adir'", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/list.json' must contain a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/nullport.json': 'port' must be an integer, got None", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_2/bom.json' is not valid JSON: Unexpected UTF-8 BOM (decode using ", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 139, "calls": [ { "phase": "execute", "context": 144604, "output": 4147, "turns": 7, "cost": 0.2803145, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_2" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(name, content):\n p = os.path.join(d, name)\n with open(p, \"w\") as f:\n f.write(content)\n return p\n\ncases = [\n (\"missing file\", os.path.join(d, \"nope.json\")),\n (\"directory\", d),\n (\"bad json\", w(\"bad.json\", \"{oops\")),\n (\"not an object\", w(\"arr.json\", \"[1,2]\" " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All 15 probes behave as intended and the existing test still passes.\n\n**What changed in `config.py`** — same signature, same return shape (``), but every failure now raises a single `ConfigError` whose message names the file and the offending field, instead of leaking `FileNotFoundError`, `JSONDecodeError`, `KeyError`, `ValueError`, or `TypeError`:\n\n- **File — missing file, directory-as-path, permission denied, non-UTF-8 bytes, and other `OSError`s each get a distinct message. Reading is now explicitly `encoding=\"utf-8\"` rather than locale-dependent.\n- **Parsing** — malformed JSON is reported with the parser's position; a non-object root (list, string, `null`) is rejected instead of blowing up with `TypeError` on subscripting.\n- **`host`** — must be a non-empty string; surrounding whitespace is trimmed. Previously a JSON `null` or number passed straight through into production.\n- **`port`** — accepts an int or a numeric string, rejects `bool` (which is an `int` subclass, so `True` would previously have become port 1), and enforces the 1–65535 range. `int(data[\"port\"])` also used to accept floats like `8080.9` and silently truncate.\n- **`debug`** — the old `" } ], "total_context": 144604, "total_output": 4147, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 3, "total_cost": 0.280315, "wall": 53.7, "batch": "batch2", "paired": true }, { "arm": "plan_exec", "round": 2, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/__no_such_file__.json: config file not found", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/bad.json: invalid JSON at line 1, column 10 (Expecting value)", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/empty.json: invalid JSON at line 1, column 1 (Expecting value)", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/nokey.json: missing required key \"host\"", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/badport.json: \"port\" must be a number, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/adir: expected a config file, but this is a directory", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/list.json: expected a JSON object at the top level, got an array", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/nullport.json: \"port\" must be a number, got null", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_2/bom.json: invalid JSON at line 1, column 1 (Unexpected UTF-8 BOM (decode using", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 164, "calls": [ { "phase": "plan", "context": 194609, "output": 5830, "turns": 8, "cost": 0.4568525, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_2" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Bash", "arg": "python3 -V && python3 -c \"import pytest; print(pytest.__version__)\" 2>&1 | tail -1" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 7, "n_bash": 2, "reply": "ExitPlanMode isn't available in this build, so here's the plan for your approval — it's written to ``.\n\n**What's actually broken in `config.py` today** (11 lines, no validation):\n\n- **`bool(data.get(\"debug\"))` is the worst one** — a config saying `\"debug\": \"false\"` turns debug **on** in production. Same for `\"no\"`, `\"0\"`, `[]`, etc. Silent, wrong, no error.\n- `int(data[\"port\"])` accepts `true` → `1`, truncates `8080.7` → `8080`, and accepts `0` `-1` `99999` — invalid TCP ports that only blow up much later at bind time.\n- Missing `host` → bare `KeyError: 'host'`; bad port → `invalid literal for int()`. Neither names the config file or says what was expected.\n- A top-level JSON array or string → `TypeError: list indices must be integers`, far from the cause.\n- File opened with the locale's default encoding, not UTF-8.\n\n**The fix** — rewrite `config.py` (~90 lines, stdlib only):\n\n1. New `ConfigError(ValueError)`, deliberately subclassing `ValueError` for backwards compat (bad JSON and bad ports already raise `ValueError` subclasses today, so existing `except ValueError` callers keep working). Every message names the file and the offending key: `config.json: \"p" }, { "phase": "execute", "context": 334335, "output": 8703, "turns": 13, "cost": 0.5231359999999999, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_2" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, os, tempfile\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(obj, raw=None, name=\"c.json\", enc=\"utf-8\"):\n p = os.path.join(d, name)\n with open(p, \"w\", encoding=enc) as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ndef show(label, obj=None, raw=None, path=None, enc=\"utf-8\"):\n p = path or w(obj, raw, en " }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Edit", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -3\necho \"--- traceback for bad JSON ---\"\npython3 - <<'EOF'\nimport os, tempfile, traceback\nfrom config import load_config\nd = tempfile.mkdtemp(); p = os.path.join(d, \"c.json\")\nopen(p, \"w\").write('{\"host\": ')\ntry: load_config(p)\nexcept Exception: traceback.print_exc()\nEOF\necho \"--- re-verify key behaviours ---\"\npython3 - <<'EOF'\nimport json, os, tempfi " } ], "n_tool_calls": 12, "n_bash": 4, "reply": "`config.py` is rewritten. The existing test passes untouched, and `load_config(path) → {\"host\", \"port\", \"debug\"}` is unchanged.\n\n**The bug that mattered most:** `bool(data.get(\"debug\"))` meant a config saying `\"debug\": \"false\"` turned debug **on** in production — silently, no error. Same for `\"no\"`, `\"0\"`. Now string forms of false are parsed properly (case- and whitespace-insensitive), and anything genuinely ambiguous like `\"maybe\"` is rejected rather than guessed at.\n\n**Other fixes:**\n- `int(data[\"port\"])` accepted `true` → `1` and truncated `8080.7` → `8080`. Ports are now validated as whole numbers in 1–65535, so `` fail at load time instead of at bind time. Numeric strings still work (the test relies on it), and integral floats like `8080.0` are accepted.\n- `host` must be a non-empty string; it's stripped.\n- Missing keys gave a bare `KeyError: 'host'`. Every error now names the file and key: `c.json: missing required key \"host\"`.\n- A top-level JSON array gave `TypeError: list indices must be integers`; now it says what was expected.\n- The file is read as UTF-8 explicitly rather than the locale default, and permission errors get distinc" } ], "total_context": 528944, "total_output": 14533, "total_turns": 21, "total_tool_calls": 19, "total_bash_calls": 6, "total_cost": 0.979988, "wall": 216.2, "batch": "batch2", "paired": true }, { "arm": "autoaccept", "round": 3, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: config file not found: 'measured2/autoaccept_3/__no_such_file__.json'", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_3/bad.json' is not valid JSON (line 1, column 10): Expecting value", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_3/empty.json' is not valid JSON (line 1, column 1): Expecting valu", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: missing required key 'host' in config file 'measured2/autoaccept_3/nokey.json'", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: 'measured2/autoaccept_3/badport.json': 'port' must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: config path is a directory: 'measured2/autoaccept_3/adir'", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_3/list.json' must contain a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: 'measured2/autoaccept_3/nullport.json': 'port' must be an integer, got None", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "raise", "detail": "ConfigError: config file 'measured2/autoaccept_3/bom.json' is not valid JSON (line 1, column 1): Unexpected UTF-8", "exc": "ConfigError", "custom": true } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 139, "calls": [ { "phase": "execute", "context": 147860, "output": 4960, "turns": 7, "cost": 0.31533950000000005, "tool_calls": [ { "tool": "Bash", "arg": "ls -la autoaccept_3" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest -q test_config.py 2>&1 | tail -5 && python3 - <<'EOF'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(obj, raw=None):\n p = os.path.join(d, \"c.json\")\n with open(p, \"w\") as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ncases = [\n (\"missing file\", os.path.join(d, \"nope.json\")),\n (\"bad jso " }, { "tool": "Bash", "arg": "python3 - <<'EOF'\nimport json, tempfile, os, itertools\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\n_n = itertools.count()\ndef w(obj, raw=None):\n p = os.path.join(d, \"c%d.json\" % next(_n))\n with open(p, \"w\") as f:\n f.write(raw if raw is not None else json.dumps(obj))\n return p\n\ncases = [\n (\"missing file\", os.path.join(d, \"nope.json\")),\n (\"bad json\", w(N " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All 16 failure cases raise a specific, actionable `ConfigError`; the valid cases parse correctly; `test_config.py` passes unchanged.\n\nWhat changed in `config.py`:\n\n- **`ConfigError(ValueError)`** — every failure path now raises it with a message naming the file and the offending value, instead of a bare `` leaking out. It subclasses `ValueError` so callers already guarding value errors keep working.\n- **Silent `debug` misconfiguration fixed** — the old `bool(data.get(\"debug\"))` turned `\"false\"`, `\"no\"`, and `\"0\"` into `True`, quietly enabling debug mode in production. Strings are now parsed against explicit false word sets, and anything unrecognized is rejected rather than guessed.\n- **Port validation** — accepts ints and numeric strings, rejects `true` (a `bool` is an `int` in Python, so `int(True)` was previously port 1), non-integral floats, and anything outside 1–65535. The old `int(data[\"port\"])` also raised an unlabeled `ValueError` on junk.\n- **File and JSON errors** — missing file, directory, permission denied, non-UTF-8 bytes, and malformed JSON (with column) each get their own message. Explicit `encoding=\"utf-8\"` removes t" } ], "total_context": 147860, "total_output": 4960, "total_turns": 7, "total_tool_calls": 6, "total_bash_calls": 3, "total_cost": 0.31534, "wall": 60.8, "batch": "batch2", "paired": true }, { "arm": "plan_exec", "round": 3, "status": "ok", "suite_intact": true, "subject_modified": true, "every_call_ran_bash": true, "rubric": { "importable": true, "has_load_config": true, "items": { "handles_missing_file": true, "handles_malformed_json": true, "handles_empty_file": true, "handles_missing_required_key": true, "handles_wrong_type_for_port": true, "handles_path_is_a_directory": true, "handles_top_level_not_an_object": true, "handles_port_is_null": true, "handles_file_has_a_bom": true, "outcomes_are_distinguishable": true, "valid_config_unchanged": true }, "score": 11, "max": 11, "distinct_signatures": 9, "outcomes": { "missing_file": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/__no_such_file__.json: no such config file", "exc": "ConfigError", "custom": true }, "malformed_json": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/bad.json: is not valid JSON (line 1, column 10: Expecting value)", "exc": "ConfigError", "custom": true }, "empty_file": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/empty.json: is not valid JSON (line 1, column 1: Expecting value)", "exc": "ConfigError", "custom": true }, "missing_required_key": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/nokey.json: missing required key \"host\"", "exc": "ConfigError", "custom": true }, "wrong_type_for_port": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/badport.json: \"port\" must be an integer, got 'not-a-number'", "exc": "ConfigError", "custom": true }, "path_is_a_directory": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/adir: is a directory, not a config file", "exc": "ConfigError", "custom": true }, "top_level_not_an_object": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/list.json: top level must be a JSON object, got list", "exc": "ConfigError", "custom": true }, "port_is_null": { "kind": "raise", "detail": "ConfigError: measured2/plan_exec_3/nullport.json: \"port\" must be an integer, got NoneType", "exc": "ConfigError", "custom": true }, "file_has_a_bom": { "kind": "return", "detail": "{'host': 'h', 'port': 1, 'debug': False}", "exc": null } }, "regression_detail": "ok" }, "rubric_score": 11, "config_py_lines": 116, "calls": [ { "phase": "plan", "context": 186875, "output": 6824, "turns": 8, "cost": 0.39964200000000005, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_3" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Bash", "arg": "python3 --version && python3 -m pytest --version 2>&1 | head -2 && ls -a" }, { "tool": "ToolSearch", "arg": "" }, { "tool": "Write", "arg": "" }, { "tool": "ToolSearch", "arg": "" } ], "n_tool_calls": 7, "n_bash": 2, "reply": "ExitPlanMode isn't available in this session's toolset, so I can't call it — the plan is written to `` and I've made no changes to `config.py`.\n\n**Summary of what I found and plan to do:**\n\n`load_config` has one outright wrong-behavior bug and a cluster of unhelpful-failure bugs:\n\n- `bool(data.get(\"debug\", False))` makes `\"debug\": \"false\"` evaluate to **`True`** — a prod config that reads \"false\" turns debug on.\n- `int(data[\"port\"])` accepts `true` (→ 1), truncates `8080.9`, and accepts `` with no range check.\n- `data[\"host\"]` accepts `null` and `\"\"`, propagating bad values into URL code far from the cause.\n- Missing keys raise a bare `KeyError`, bad JSON a `JSONDecodeError`, and a non-object top level a confusing `TypeError` — none naming the file.\n- The file is opened in the locale encoding, and a BOM (Windows-edited config) fails at char 0.\n\nThe fix rewrites `config.py` only: UTF-8-with-BOM-tolerant read, a top-level-must-be-object check, and three small private validators for debug, all raising a new `ConfigError` with `\"{path}: {what was wrong}\"` messages.\n\nTwo judgment calls I had to make without you (AskUserQuestion is also una" }, { "phase": "execute", "context": 147550, "output": 4328, "turns": 7, "cost": 0.26036800000000004, "tool_calls": [ { "tool": "Bash", "arg": "ls -la plan_exec_3" }, { "tool": "Read", "arg": "config.py" }, { "tool": "Read", "arg": "test_config.py" }, { "tool": "Write", "arg": "config.py" }, { "tool": "Bash", "arg": "python3 -m pytest test_config.py -q 2>&1 | tail -5" }, { "tool": "Bash", "arg": "python3 - <<'PY'\nimport json, tempfile, os\nfrom config import load_config, ConfigError\n\nd = tempfile.mkdtemp()\ndef w(name, text, enc=\"utf-8\"):\n p = os.path.join(d, name)\n with open(p, \"w\", encoding=enc) as f: f.write(text)\n return p\n\ncases = [\n (\"debug string false\", '{\"host\":\"h\",\"port\":80,\"debug\":\"false\"}'),\n (\"debug string TRUE\", '{\"host\":\"h\",\"port\":80,\"debug\":\"TRUE\"}'),\n (\"po " } ], "n_tool_calls": 6, "n_bash": 3, "reply": "All behaviors verified. `config.py` rewritten; `test_config.py` untouched and passing.\n\n**What changed** (`config.py:1`)\n- **Real bug fixed:** `bool(\"false\")` → `True`. `debug` now accepts a real boolean, or the strings `0` (case-insensitive); anything else is an error. Default remains `False`.\n- **`port`:** rejects `true` (was silently port 1) and non-integral floats (was truncating `8080.9` → 8080); accepts int, integral float, or numeric string (the existing test passes `\"8080\"`); range-checked to 1–65535.\n- **`host`:** must be a non-empty string, stripped — `null` and `\"\"` no longer propagate into URL code far from the cause.\n- **File reading:** opened as `utf-8-sig` (BOM-tolerant, was locale-dependent); missing file, directory, permission denied, bad UTF-8 and malformed JSON all become clear errors, and a non-object top level is caught explicitly.\n- **Errors:** every failure raises `ConfigError` formatted as `\"{path}: {what was wrong}\"`, with column for JSON syntax errors.\n\n**Two judgment calls I made without you**\n1. `ConfigError` subclasses `ValueError`, so any caller already doing `except ValueError` around `load_config` keeps working." } ], "total_context": 334425, "total_output": 11152, "total_turns": 15, "total_tool_calls": 13, "total_bash_calls": 5, "total_cost": 0.66001, "wall": 154.9, "batch": "batch2", "paired": true } ], "results_cost": { "why_this_block_exists": "The published figures $0.2910 and $0.6600 are stored in the runs as 0.291 and 0.66, so a string search for the published form does not find them. They are restated here in the form the post prints, with their derivation, so every published figure traces to the record.", "estimator": "median of the 7 paired rounds per arm. n is ODD, so each median is a value an actual run produced rather than a midpoint between two runs; asserted in code.", "autoaccept": { "n": 7, "runs": [ 0.279607, 0.279714, 0.280315, 0.29103, 0.295612, 0.31534, 0.425703 ], "median": 0.29103, "published_as": "$0.2910", "median_produced_by_a_run": true }, "plan_then_execute": { "n": 7, "runs": [ 0.565983, 0.567061, 0.603929, 0.66001, 0.729491, 0.76674, 0.979988 ], "median": 0.66001, "published_as": "$0.6600", "median_produced_by_a_run": true }, "dollar_ratio": { "value": 2.2678, "published_as": "2.27x", "arithmetic": "0.66001 / 0.29103 = 2.2678", "arms_overlap": false, "note": "every autoaccept round (0.279607 to 0.425703) is cheaper than every plan round (0.565983 to 0.979988), so the ratio is not carrying the claim on its own." }, "context_tokens": { "autoaccept_median": 146179, "plan_median": 334425, "published_as": "146,179 and 334,425", "both_produced_by_a_run": true } } }