Sync OpenAPI after gating Mythos

[DanielButler1]

Summary

• remove the now non-routable Claude Mythos 5.1 model from the public OpenAPI model enum
• restore OpenAPI enum synchronization after the Project Glasswing route was gated in Gate Mythos and track Fable providers #2140

Validation

• pnpm run openapi:sync-enums
• git diff --exit-code -- apps/docs/openapi/v1/openapi.yaml after regeneration
• pnpm run openapi:lint (passes with the repository's existing warnings and no errors)

Failure repaired

• PR Add Fable 5.1 and Gemini 3.8 release dates #2141: OpenAPI lint / Ensure OpenAPI enum sync is committed

Summary by CodeRabbit

• Documentation
  • Removed the deprecated anthropic/claude-mythos-5.1 model from the documented list of supported model identifiers.

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1 Skipped Deployment

Project	Deployment	Actions	Updated
phaseo	Skipped		Sep 1, 2026 10:57pm UTC

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Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

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📥 Commits

Reviewing files that changed from the base of the PR and between ff51629 and a224394.

⛔ Files ignored due to path filters (3)

• packages/sdk/sdk-cpp/src/gen/model_ids.hpp is excluded by !**/gen/**
• packages/sdk/sdk-go/src/gen/models.go is excluded by !**/gen/**
• packages/sdk/sdk-py/src/gen/models.py is excluded by !**/gen/**

📒 Files selected for processing (9)

• packages/sdk/sdk-csharp/ModelIds.cs
• packages/sdk/sdk-go/model_ids.go
• packages/sdk/sdk-java/src/app/phaseo/sdk/ModelIds.java
• packages/sdk/sdk-php/src/ModelIds.php
• packages/sdk/sdk-py/src/phaseo/model_ids.py
• packages/sdk/sdk-ruby/lib/phaseo_sdk/model_ids.rb
• packages/sdk/sdk-rust/src/model_ids.rs
• packages/sdk/sdk-ts/src/modelIds.ts
• packages/sdk/sdk-ts/src/oapi-gen/models/KnownModelId.ts

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Reviewing files that changed from the base of the PR and between 5d7cd13 and ff51629.

📒 Files selected for processing (1)

• apps/docs/openapi/v1/openapi.yaml

💤 Files with no reviewable changes (1)

• apps/docs/openapi/v1/openapi.yaml

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📝 Walkthrough

Walkthrough

The OpenAPI specification removes anthropic/claude-mythos-5.1 from the KnownModelId enum.

Changes

Cohort / File(s)	Summary
OpenAPI model enum apps/docs/openapi/v1/openapi.yaml	Removes anthropic/claude-mythos-5.1 from the KnownModelId enum.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to ff516

This is a narrowly scoped OpenAPI synchronization change with no actionable merge-blocking risk remaining beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: synchronizing the OpenAPI specification after gating the Mythos model. It is concise and specific.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/sync-openapi-after-mythos-gate-20260901

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