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85e8699451
## Description `_format_tool_call` in `headroom/learn/analyzer.py` built the error preview with a head-only slice — `tc.output[:200]`. For tracebacks the root cause (`ExceptionType: message`) is at the **tail**, so the digest showed only `Traceback (most recent call last):` plus the first frame and dropped the actual diagnosis. The issue reports 46% of 715 measured errors were truncated past the 200-char head. Closes #2590 ## Type of Change - [x] Bug fix (non-breaking change that fixes an issue) ## Changes Made - Added `_truncate_head_tail()` helper that collapses newlines and, when over budget, keeps both the head and the tail joined by `…`. - `_format_tool_call` now uses it for error output so the exception line survives truncation. Short errors are returned unchanged (no marker). ## Testing - [x] Unit tests pass (`pytest`) - [x] Linting passes (`ruff check .`) - [ ] Type checking passes (`mypy headroom`) - [x] New tests added for new functionality ### Test Output ```text $ uv run pytest tests/test_learn/test_analyzer.py::TestDigestBuilder -q 9 passed in 1.47s $ uv run ruff check headroom/learn/analyzer.py tests/test_learn/test_analyzer.py All checks passed! ``` ## Real Behavior Proof - Environment: headroom @ main, Python 3.14, uv - Exact command / steps: added a long synthetic traceback (`KeyError: 'the-actual-root-cause'` at the tail) as a failing tool call and built the digest. - Observed result: digest now contains both `Traceback` and `KeyError: 'the-actual-root-cause'`, separated by `…`; short errors have no `…`. - Not tested: mypy not run locally. ## Review Readiness - [x] I have performed a self-review - [x] This PR is ready for human review ## Checklist - [x] My code follows the project's style guidelines - [x] I have performed a self-review of my code - [x] I have commented my code, particularly in hard-to-understand areas - [x] My changes generate no new warnings - [x] I have added tests that prove my fix is effective - [x] New and existing unit tests pass locally with my changes - [x] I did **not** edit `CHANGELOG.md` ## Additional Notes Truncation budget stays at 200 chars (now split head/tail). mypy not run locally; happy to adjust if CI flags anything. |
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| .. | ||
| __init__.py | ||
| test_analyzer.py | ||
| test_claude_config_dir.py | ||
| test_error_classification.py | ||
| test_gemini_scanner.py | ||
| test_integration.py | ||
| test_loop_weighting.py | ||
| test_opencode_scanner.py | ||
| test_plugin_encoding.py | ||
| test_registry.py | ||
| test_rtk_loop_eval.py | ||
| test_scanner.py | ||
| test_subagent_scanning.py | ||
| test_writer.py | ||