* fix(observer): auto-scale max_turns by analysis batch size (#2035)
The hardcoded default of MAX_TURNS=20 is insufficient when
MAX_ANALYSIS_LINES=500 (also the default). Claude exhausts its turn
budget before it can write all discovered instinct files, producing:
Error: Reached max turns (20)
Fix: when ECC_OBSERVER_MAX_TURNS is not explicitly set, compute
max_turns proportionally to the actual analysis batch size:
max_turns = clamp(analysis_count / 10, 20, 100)
This gives:
- 20–199 lines → 20 turns (existing floor, unchanged)
- 500 lines → 50 turns (resolves the reported failure)
- 1000 lines → 100 turns (cap)
Explicitly setting ECC_OBSERVER_MAX_TURNS still overrides the
auto-scaled value, preserving the existing escape hatch.
* test(observer): update max_turns test for auto-scaling; document validation
The max-turns budget test in tests/hooks/hooks.test.js still asserted the removed literal max_turns="${ECC_OBSERVER_MAX_TURNS:-20}", which would fail against the new auto-scaling logic. Assert the auto-scale formula and the 20/100 clamp bounds instead.
Also add the explanatory comment CodeRabbit requested above the max_turns sanitization block, clarifying it guards the explicit ECC_OBSERVER_MAX_TURNS override path.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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