Rebuilt fresh on current main per review feedback on the first PR
(#1763): rebase instead of dragging four generations of merge
conflicts forward.
Carries the first PR's hardening (Step 1 trust boundary, substitution
discipline) and closes all six limitations that PR documented as v1
work:
- L1 worktree/branch names get a doc-path sha8 suffix (collision-proof
across same-stem design docs)
- L2 CHANGELOG/VERSION named expected-conflict files in Merge order,
slab prompts, and the wall-clock report
- L3 Slab 0 promotion keeps contract ownership with the owning slab
- L4 over-decomposition guard: draft-contract refusal in heuristic 4 +
parallelism-confidence check (stop when >1/3 of slabs chain)
- L5 table cells escape pipes, collapse newlines
- L6 per-slab .prompt.md files replace heredocs in the dispatch script
(kills the EOF-breakout class, prompts editable before dispatch)
test/fanout.test.ts pins all six guardrails. 7/7 pass.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>