feat: vendor permission system source

2026-08-28 16:45:22 +00:00 · 2026-08-19 14:35:19 +08:00
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+---
+issue: 52
+issue_title: "Bash command arity table for smart approval pattern suggestions"
+---
+
+# Retro: #52 — Bash command arity table for smart approval pattern suggestions
+
+## Final Retrospective (2026-05-04T22:35:00-04:00)
+
+### Session summary
+
+Planned and implemented a curated arity dictionary (`src/bash-arity.ts`) that replaces the naive first-word heuristic in `suggestBashPattern()` with longest-match-wins prefix lookup.
+Four TDD steps executed cleanly with one minor downstream test fix.
+Released as v4.7.0.
+
+### Observations
+
+#### What went well
+
+- Plan-to-implementation was a straight line — the design overview worked through edge cases (single-token, arity-covers-all-tokens, trailing wildcard vs space wildcard) thoroughly enough that zero design decisions were needed at coding time.
+- Downstream test breakage in `tests/handlers/tool-call.test.ts` was caught by the full-suite run after step 3, fixed in the same commit (amend), exactly per AGENTS.md guidance.
+- The issue's scope was tight and self-contained — no dependency conflicts, no config format changes, no breaking changes.
+
+#### What caused friction (agent side)
+
+- No significant friction points this session.
+
+#### What caused friction (user side)
+
+- No significant friction points this session.
+
+### Changes made
+
+1. `docs/retro/0052-bash-arity-table.md` — this file.