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docs(plan): add Phase 2.5 context budget reliability (#44)

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#5 smoke test showed the dir loop exhausts the 126k context budget on
a 13-file Python lib. Sequencing #44 between Phase 2 and Phase 3 so
the foundation is solid before planning + external tools add more
prompt and tool weight.
This commit is contained in:
Jeff Smith 2026-04-06 21:59:01 -06:00
parent ffd9d9e929
commit e942ecc34a
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PLAN.md
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@ -541,6 +541,15 @@ without 9 phases of rework.
Until then, the survey prompt carries a Band-Aid warning that the Until then, the survey prompt carries a Band-Aid warning that the
histogram is biased toward source code. histogram is biased toward source code.
### Phase 2.5 — Context budget reliability (#44)
- Dir loop exhausts the 126k context budget on a 13-file Python lib
(observed during #5 smoke test). Must be addressed before Phase 3
adds longer prompts and more tools, or every later phase will
inherit a broken foundation.
- Investigate root cause (tool result accumulation, parse_structure
output size, redundant reads) before picking a fix.
- Add token-usage instrumentation so regressions are visible.
### Phase 3 — Investigation planning ### Phase 3 — Investigation planning
- Planning pass after survey, before dir loops - Planning pass after survey, before dir loops
- `submit_plan` tool - `submit_plan` tool