feat(model-overlays): add fable-5 overlay + resolver mapping#2246
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chrisquorum wants to merge 1 commit into
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feat(model-overlays): add fable-5 overlay + resolver mapping#2246chrisquorum wants to merge 1 commit into
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Give claude-fable-5 a dedicated overlay instead of the generic claude fallback: inherits the claude base plus Fable-family nudges (act when ready, ground progress claims, assessment-vs-action, delegate). Adds the models.ts resolver mapping and a gate-tier test mirroring the opus overlays.
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What
Claude Fable 5 (
claude-fable-5) is Anthropic's most capable widely releasedmodel — the current overall flagship. Today
claude-fable-5*resolves throughmodels.tsto the genericclaudeoverlay. This adds a dedicatedfable-5overlay so it inherits the
claudebase plus Fable-family nudges tuned to how5.x actually behaves.
Changes
model-overlays/fable-5.md(new) —{{INHERIT:claude}}+ four nudges: act whenyou have enough context (Fable can over-plan on ambiguous tasks), ground progress
claims in tool-result evidence, assessment-vs-action boundaries, and delegate
independent work to sub-agents.
scripts/models.ts— addfable-5toALL_MODEL_NAMESand aresolveModelmapping (
/^claude-fable-5(-|$)/ → fable-5), placed before the genericclaudefallback.
test/model-overlay-fable-5.test.ts(new) — gate-tier test mirroring theopus-4-*overlay tests (inherits base, carries the Fable nudges, no unresolvedINHERIT).
Notes
on ambiguity, progress-claim grounding, literal boundaries, sub-agent delegation),
kept to the short form the other overlays use. Retune as more patterns emerge.
claude-fable-5; the Project Glasswing siblingclaude-mythos-5(samebehavior) can be mapped to this overlay in a follow-up.
Validation
resolveModel('claude-fable-5')/'claude-fable-5-20260601'→fable-5;claude-opus-4-7,claude-sonnet-*, and bareclaudeunchanged.bun test test/model-overlay-fable-5.test.ts→ all pass.bun run gen:skill-docs→ no generated-doc churn (only the three files above).bun run typecheck→ no new errors in the changed files.