fix(server): preview builds keep their bundled OpenCode 2 compatibility policy

[juliusmarminge]

[!WARNING] V2 preview-only stopgap: revert before merging into main
Listed on #2829's "Revert before merging into main" checklist.

The server fetches model-manifest.json from main at runtime and adopts its compatibility policy. Main marks OpenCode >=2.0.0 broken (#14198). That is right for stable and nightly, which have no OpenCode 2 runtime, but V2 preview builds do run OpenCode 2, so they show it as broken. A policy's t3CodeRange cannot target preview builds: satisfiesSemverRange drops the prerelease tag, and stable, nightly and preview all share the same 0.0.4x base version.

What changed

• ModelManifest: when the server's own version (apps/server/package.json, stamped with the full x.y.z-preview.YYYYMMDD.N version by scripts/update-release-package-versions.ts in release.yml) is on the preview channel (cliReleaseChannelOf), a fetched or disk-cached manifest keeps BUNDLED_MODEL_MANIFEST.compatibility. Model lists, defaults and everything else still come from the fetched manifest. The disk cache still stores the unmodified fetched manifest; the override is applied when it is loaded. Stable and nightly behavior is unchanged. make is now makeForVersion(packageJson.version) so tests can build the service for each channel.
• Bundled model-manifest.json (V2 only; main's copy is untouched): OpenCode >=2.0.18 supported, >=2.0.0 <2.0.18 unsupported, >=1.14.19 <2.0.0 graceful (limited support), <1.14.19 broken, recommendedRange >=2.0.18. recommendedVersion is dropped, because a pinned 1.14.19 would now be a graceful version and the schema requires the recommendation to land in a supported range.
• The override is marked in code as a temporary V2 preview stopgap to revert before merging into main.

Verification

• vp test run src/provider/providerCompatibility.test.ts src/provider/ModelManifest.test.ts src/provider/Layers/ProviderRegistry.test.ts src/provider/providerMaintenanceRunner.test.ts src/provider/CodexInstallation.test.ts (apps/server): 5 files, 126 tests passed.
  • New: a preview version (0.0.44-preview.20260929.1) keeps the bundled policy after a refresh that fetches main's OpenCode policy (OpenCode 2.0.18 → supported), including after a restart that reads the disk cache. Stable (0.0.44) and nightly (0.0.44-nightly.20260929.1) adopt the fetched policy (2.0.18 → broken).
  • New: the bundled OpenCode policy classifies 2.0.18 and 2.1.0 as supported, 2.0.0 and 2.0.17 as unsupported, 1.14.19 and 1.99.0 as graceful, 1.14.18 as broken, with recommendedRange >=2.0.18.
  • Mutation check: with the preview branch disabled, only the preview test fails.
• vp exec tsc --noEmit -p . (apps/server): exit 0, no error TS.
• vp lint on the touched files: exit 0.
• vpr knip:check: exit 0.
• Not run: repo-wide checks, a real preview build, web or mobile clients (no client code changed).

Model: Claude Opus 5.5 (Claude Code)

🤖 Generated with Claude Code

---

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This changes the shipped OpenCode compatibility recommendation and status defaults, while adding release-channel-specific behavior that changes provider advisories for preview, stable, and nightly builds. The implementation is focused and tested, but the product-default and user-visible policy changes warrant human review.

Notes:

• All code in this push has already been reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

ℹ️ No successful main baseline artifact is available yet. This run establishes the initial measurement.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	—	4.9 KiB	—	6.8 KiB	✅
Codex	Thread snapshot wire	—	3.7 KiB	—	4.9 KiB	✅
Codex	Live turn WebSocket wire	—	1.2 KiB	—	2.0 KiB	✅
Codex	Live turn WebSocket decoded	—	20.4 KiB	—	29.3 KiB	✅
Codex	Live turn messages	—	2	—	8	✅
Claude	Total thread wire	—	4.9 KiB	—	6.8 KiB	✅
Claude	Thread snapshot wire	—	3.7 KiB	—	4.9 KiB	✅
Claude	Live turn WebSocket wire	—	1.2 KiB	—	2.0 KiB	✅
Claude	Live turn WebSocket decoded	—	20.8 KiB	—	29.3 KiB	✅
Claude	Live turn messages	—	2	—	8	✅

Baseline: unavailable · PR result: 19c0c91 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 106.1 KiB
• Claude decoded thread snapshot: 106.4 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.