fix(pstack): use rolling Claude model aliases

[ericlitman]

Closes #38

What changed

• replace active Fable and Opus model IDs with Claude's rolling fable and opus aliases
• normalize older generated descriptors in memory before route selection
• let setup-pstack persist that migration after its existing probes and confirmation
• reject any versioned Fable or Opus model that reaches the external runner
• verify alias requests against Claude's concrete provider-reported family
• add a static guard against reintroducing active version pins
• bump Open Pstack to 1.2.1

Verification

• Bun tests, strict typecheck, static invariants, and plugin validation pass.
• The exact candidate is installed in every affected harness.
• The changed behavior passes from each real user surface.
• The installed version, action, and observed result appear below.

Repository checks at 91dfdec041db540bb7a655eb62a82d09effa6e7a:

• GitHub CI verify: passing, including the required parallel bun run test
• complete local Bun suite: 158 passing, 657 assertions
• strict TypeScript typecheck
• PSTACK_STATIC_ONLY=1 bash tests/skill-collision-repro.sh
• Claude plugin and marketplace validation
• all four manifests parse
• no active Fable 5 or Opus 5 references
• static guard probe rejects a standalone model: "claude-fable-5" value
• Fable completion review: Fix on the setup-only migration, then Ship after read-time normalization and the runner backstop
• Greptile P2 on standalone TypeScript pins fixed in 91dfdec; review thread resolved

The review-only commit changed no shipped plugin bytes: the plugins/pstack tree remains 4821300b9bc564d826bb4a828523ddc967c6d9d3.

Live evidence from installed Open Pstack 1.2.1:

• studio2 Claude Code: tracked plugin mismatches against the candidate: 0; native pstack-fable-low returned the requested marker and reported claude-fable-5-1; native pstack-opus-low returned the requested marker and reported claude-opus-5
• studio2 Codex: tracked plugin mismatches: 0; the installed setup skill reports first-run descriptors claude:fable@max and claude:opus@xhigh with zero writes
• studio2 Codex external runner: --model fable and --model opus both completed with nonempty output; receipts verified claude-fable-5-1 and claude-opus-5 from provider reports
• pro14 Claude Code: installed at the normal user scope with tracked plugin mismatches: 0; native provider requests currently fail before model selection because that host's OAuth refresh token is expired
• pro14 Codex: tracked plugin mismatches: 0; the installed setup skill read the real legacy sheet and normalized claude:claude-fable-5@xhigh to claude:fable@xhigh and claude:claude-opus-5@xhigh to claude:opus@xhigh in memory with zero writes
• both installed Codex runners reject an unnormalized version pin with exit 64 before provider preflight

The exact candidate therefore passes the installed Claude Code and Codex user-surface gate. pro14's host-specific Claude login does not affect package behavior or the completed cross-harness release gate.

[greptile-apps]

Greptile Summary

Open Pstack 1.2.1 moves Fable and Opus execution to Claude’s rolling aliases while preserving concrete provider-model verification.

• Normalizes legacy descriptors before routing and during setup migration.
• Rejects versioned Fable and Opus models at the external runner boundary.
• Updates native profiles, defaults, documentation, manifests, and regression checks.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
tests/skill-collision-repro.sh	Adds production TypeScript and JavaScript scanning that addresses the prior standalone-pin guard gap.
plugins/pstack/skills/poteto-mode/scripts/runner/model-aliases.ts	Defines strict rolling-alias recognition, legacy revision normalization, and concrete-family matching.
plugins/pstack/skills/poteto-mode/scripts/runner/run.ts	Rejects versioned Claude family pins before external provider execution and applies provider-aware model proof.
plugins/pstack/skills/poteto-mode/scripts/runner/parse-output.ts	Verifies alias requests against concrete Claude model-family reports while retaining existing matching for other providers.
plugins/pstack/skills/setup-pstack/SKILL.md	Documents in-memory normalization and confirmation-gated persistence of legacy model descriptors.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[Configured Claude descriptor] --> B{Legacy version pin?}
  B -->|Yes| C[Normalize to fable or opus]
  B -->|No| D[Use current descriptor]
  C --> E{Parent route}
  D --> E
  E -->|Claude Code| F[Native rolling-alias profile]
  E -->|Codex parent| G[External Claude runner]
  G --> H[Reject missed version pins]
  H --> I[Invoke rolling alias]
  I --> J[Verify concrete reported family]

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_{Reviews (2): Last reviewed commit: "test(pstack): catch standalone Claude mo..." | Re-trigger Greptile}

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