Files
gstack/model-overlays/gpt-5.4.md
T
Garry Tan 6c8cf6774f feat: model overlays with explicit --model flag (no auto-detect)
Adds a per-model behavioral patch layer orthogonal to the host axis.
Different LLMs have different tendencies (GPT won't stop, Gemini
over-explains, o-series wants structured output). Overlays nudge each
model toward better defaults for gstack workflows.

Codex review caught three landmines the prior reviews missed:
1. Host != model — Claude Code can run any Claude model, Codex runs
   GPT/o-series, Cursor fronts multiple providers. Auto-detecting from
   host would lie. Dropped auto-detect. --model is explicit (default
   claude). Missing overlay file → empty string (graceful).
2. Import cycle — putting Model in resolvers/types.ts would cycle
   through hosts/index. Created neutral scripts/models.ts instead.
3. "Final say" is dangerous — overlay at the end of preamble could
   override STOP points, AskUserQuestion gates, /ship review gates.
   Placed overlay after spawned-session-check but before voice + tier
   sections. Wrapper heading adds explicit subordination language on
   every overlay: "subordinate to skill workflow, STOP points,
   AskUserQuestion gates, plan-mode safety, and /ship review gates."

Changes:
- scripts/models.ts: new neutral module. ALL_MODEL_NAMES, Model type,
  resolveModel() for family heuristics (gpt-5.4-mini → gpt-5.4, o3 →
  o-series, claude-opus-4-7 → claude), validateModel() helper.
- scripts/resolvers/types.ts: import Model, add ctx.model field.
- scripts/resolvers/model-overlay.ts: new resolver. Reads
  model-overlays/{model}.md. Supports {{INHERIT:base}} directive at
  top of file for concat (gpt-5.4 inherits gpt). Cycle guard.
- scripts/resolvers/index.ts: register MODEL_OVERLAY resolver.
- scripts/resolvers/preamble.ts: wire generateModelOverlay into
  composition before voice. Print MODEL_OVERLAY: {model} in preamble
  bash so users can see which overlay is active. Filter empty sections.
- scripts/gen-skill-docs.ts: parse --model CLI flag. Default claude.
  Unknown model → throw with list of valid options.
- model-overlays/{claude,gpt,gpt-5.4,gemini,o-series}.md: behavioral
  patches per model family. gpt-5.4.md uses {{INHERIT:gpt}} to extend
  gpt.md without duplication.
- test/gen-skill-docs.test.ts: fix qa-only guardrail regex scope.
  Was matching Edit/Glob/Grep anywhere after `allowed-tools:` in the
  whole file. Now scoped to frontmatter only. Body prose (Claude
  overlay references Edit as a tool) correctly no longer breaks it.

Verification:
- bun run gen:skill-docs --host all --dry-run → all fresh
- bun run gen:skill-docs --model gpt-5.4 → concat works, gpt.md +
  gpt-5.4.md content appears in order
- bun run gen:skill-docs --model unknown → errors with valid list
- All generated skills contain MODEL_OVERLAY: claude in preamble
- Golden ship fixtures regenerated

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-17 06:01:27 +08:00

683 B

{{INHERIT:gpt}}

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