Enable GitHub-hosted inference for Codex by Copilot · Pull Request #54606 · github/gh-aw

Copilot · 2026-08-21T19:50:35Z

Codex workflows can now select GitHub-hosted inference through the existing top-level model field. Setting engine: codex with model: copilot-large configures Codex’s BYOK path for GitHub Inference Cloud and GitHub Models.

engine: codex
model: copilot-large

permissions:
  copilot-requests: write

Provider routing
- Infer the GitHub provider from copilot-large.
- Preserve explicit engine.provider and engine.model-provider overrides.
- Resolve and validate the selected provider endpoint through AWF reflection.
Authentication
- Use COPILOT_GITHUB_TOKEN for GitHub-hosted inference.
- Support ${{ github.token }} with copilot-requests: write.
- Retain existing OpenAI credentials for other Codex models.
Network configuration
- Include Copilot domains in Codex’s runtime and sanitization allowlists.
- Keep provider endpoint validation strict without falling back to unrelated endpoints.
Coverage and documentation
- Add compiler, engine, and harness tests for provider selection, credentials, and endpoint routing.
- Document Codex configuration with copilot-large.
- Add a release changeset.

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

pelikhan · 2026-08-21T20:22:53Z

@copilot enable this feature on a few agentic workflows using copilot in this repo

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-08-21T20:38:48Z

@copilot enable this feature on a few agentic workflows using copilot in this repo

Enabled GitHub-hosted Codex inference in smoke-codex, issue-arborist, and duplicate-code-detector with model: copilot-large and copilot-requests: write. Recompiled their lockfiles in commit 78e7dee4f3.

pelikhan · 2026-08-21T20:58:39Z

@copilot not copilot-large... copilot/* configures copilot as the inference provider.

Ex: copilot/auto

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-08-21T21:16:00Z

@copilot not copilot-large... copilot/* configures copilot as the inference provider.

Ex: copilot/auto

Updated Codex routing to use the copilot/* provider prefix and strip it before invoking Codex. The example workflows now use model: copilot/auto. Addressed in 34616c9aa6 (with test wording cleanup in acd7b83bf1).

pelikhan · 2026-08-21T21:38:50Z

@copilot in this mode, you need to use codex BYOK route or it will fail (see error in agent job at https://github.com/github/gh-aw/actions/runs/32527867880/job/96913833938). Review codex byok guidance and configure the GitHub copilot inference endpoint as a BYOK provider. merge main and recompile

…ine-support # Conflicts: # .github/workflows/duplicate-code-detector.lock.yml # .github/workflows/issue-arborist.lock.yml # .github/workflows/smoke-codex.lock.yml Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-08-21T22:29:35Z

@copilot in this mode, you need to use codex BYOK route or it will fail (see error in agent job at https://github.com/github/gh-aw/actions/runs/32527867880/job/96913833938). Review codex byok guidance...

Configured Codex’s copilot/* route as a custom BYOK Responses provider, isolated the real GitHub token from sandboxes, selected the Copilot gateway for external detection, merged main, and recompiled workflows. Addressed in 2ff3af9701.

pelikhan · 2026-08-22T23:39:05Z

/smoke-codex

github-actions · 2026-08-22T23:39:42Z

🌑 The shadows whisper... Smoke Codex failed. The oracle requires further meditation...

🔮 The oracle has spoken through Smoke Codex

pelikhan · 2026-08-23T00:11:03Z

@copilot investigate https://github.com/github/gh-aw/actions/runs/32605816618/job/97110738580

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-08-23T00:31:10Z

@copilot investigate https://github.com/github/gh-aw/actions/runs/32605816618/job/97110738580

The run failed before Codex started: AWF could not resolve RUNNER_TOOL_CACHE referenced by Serena’s MCP mount because the gateway container did not receive that environment variable. Commit 87473f5 forwards the non-secret runner path only when a configured MCP mount needs it and recompiles affected workflows, including smoke-codex.

github-actions · 2026-08-23T00:32:48Z

PR Triage

Category: feature
Risk: high
Score: 45/100 (impact 30, urgency 5, quality 10)
Recommended action: defer

Draft PR, large diff (64 files) touching auth/provider routing across many generated workflows. No reviews yet, mergeable_state blocked. Recommend deferring until draft status is lifted and CI/review are available.

Generated by 🔧 PR Triage Agent · auto · 44.3 AIC · ⌖ 5.93 AIC · ⊞ 8.3K · ◷

pelikhan · 2026-08-23T02:01:09Z

@copilot merge main and recompile

…ine-support # Conflicts: # .github/workflows/archie.lock.yml # .github/workflows/cloclo.lock.yml # .github/workflows/daily-compiler-quality.lock.yml # .github/workflows/daily-file-diet.lock.yml # .github/workflows/daily-function-namer.lock.yml # .github/workflows/daily-mcp-concurrency-analysis.lock.yml # .github/workflows/daily-testify-uber-super-expert.lock.yml # .github/workflows/developer-docs-consolidator.lock.yml # .github/workflows/duplicate-code-detector.lock.yml # .github/workflows/glossary-maintainer.lock.yml # .github/workflows/go-fan.lock.yml # .github/workflows/linter-miner.lock.yml # .github/workflows/mcp-inspector.lock.yml # .github/workflows/purelock.lock.yml # .github/workflows/semantic-function-refactor.lock.yml # .github/workflows/sergo.lock.yml # .github/workflows/smoke-codex.lock.yml # .github/workflows/smoke-copilot-aoai-apikey.lock.yml # .github/workflows/smoke-copilot-aoai-entra.lock.yml # .github/workflows/smoke-copilot-arm.lock.yml # .github/workflows/smoke-copilot.lock.yml # .github/workflows/spec-extractor.lock.yml # .github/workflows/spec-librarian.lock.yml # .github/workflows/terminal-stylist.lock.yml # .github/workflows/typist.lock.yml Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-08-23T02:19:28Z

@copilot merge main and recompile

Merged the latest main and recompiled all agentic workflows in 3f65e5ec68.

pelikhan · 2026-08-23T02:23:47Z

/smoke-codex

github-actions · 2026-08-23T02:24:31Z

🌑 The shadows whisper... Smoke Codex failed. The oracle requires further meditation...

🔮 The oracle has spoken through Smoke Codex

github-actions · 2026-08-23T06:23:15Z

PR Triage

Category: feature (Codex GitHub-hosted inference support)
Risk: high
Priority score: 40/100 (impact 30, urgency 5, quality 5)
Recommended action: defer

Rationale: Large cross-cutting change (64 files, +1087/-370) touching provider routing, auth, network allowlists, and regenerating dozens of .lock.yml workflow files. CI agent check run failed on latest commit. Draft status. High blast radius across many workflows warrants careful human review before promotion; defer until CI passes and scope is narrowed/reviewed.

Generated by 🔧 PR Triage Agent · auto · 26.2 AIC · ⌖ 6.14 AIC · ⊞ 8.4K · ◷

pelikhan · 2026-08-23T06:35:46Z

@copilot merge main and recompile

…ine-support Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-08-23T06:52:47Z

@copilot merge main and recompile

Merged the latest main and recompiled all 289 agentic workflows in 04034b071f; recompilation produced no additional lockfile delta.

pelikhan · 2026-08-23T07:16:18Z

/smoke-codex

github-actions · 2026-08-23T07:17:20Z

🌑 The shadows whisper... Smoke Codex failed. The oracle requires further meditation...

🔮 The oracle has spoken through Smoke Codex

Copilot AI and others added 2 commits August 21, 2026 19:39

Add Copilot inference routing for Codex

fdd685c

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Tighten Codex provider validation

3b21f5f

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot AI assigned Copilot and pelikhan Aug 21, 2026

Copilot AI changed the title ~~Support Copilot inference models with Codex~~ Enable GitHub-hosted inference for Codex Aug 21, 2026

Copilot finished work on behalf of pelikhan August 21, 2026 19:51

Copilot created this pull request from a session on behalf of pelikhan August 21, 2026 19:51 View session

Copilot AI requested a review from pelikhan August 21, 2026 19:51

Copilot started work on behalf of pelikhan August 21, 2026 20:23 View session

Copilot AI and others added 2 commits August 21, 2026 20:28

Plan Codex workflow rollout

cc2aa95

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Enable Copilot inference in Codex workflows

78e7dee

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot finished work on behalf of pelikhan August 21, 2026 20:39

Copilot started work on behalf of pelikhan August 21, 2026 20:58 View session

Copilot AI and others added 2 commits August 21, 2026 21:10

Use Copilot model prefix for Codex

34616c9

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Clarify unprefixed Codex model test

acd7b83

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot finished work on behalf of pelikhan August 21, 2026 21:25

Copilot started work on behalf of pelikhan August 21, 2026 21:39 View session

Copilot AI and others added 7 commits August 21, 2026 21:47

Route Codex Copilot inference through BYOK

f075c1f

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Update Codex BYOK compiler expectations

d796196

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Cover external Codex BYOK detection

a5fa4b1

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Harden Codex BYOK routing

2ab8cfa

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Harden Codex Copilot BYOK isolation

f81e23e

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Validate Codex Copilot proxy isolation

20ca94c

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot finished work on behalf of pelikhan August 22, 2026 23:33

github-actions Bot mentioned this pull request Aug 22, 2026

[aw] Smoke Codex failed #54929

Open

Merge branch 'main' into copilot/add-codex-engine-support

9d4f605

Copilot started work on behalf of pelikhan August 23, 2026 00:11 View session

Copilot AI and others added 2 commits August 23, 2026 00:24

Forward runner tool cache to MCP gateway

87473f5

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Expand MCP mount forwarding coverage

79468f8

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot finished work on behalf of pelikhan August 23, 2026 00:31

github-actions Bot mentioned this pull request Aug 23, 2026

[PR Triage Report] PR Triage Report — Run 32607782829 #54938

Closed

Copilot started work on behalf of pelikhan August 23, 2026 02:01 View session

Copilot finished work on behalf of pelikhan August 23, 2026 02:20

github-actions Bot mentioned this pull request Aug 23, 2026

[aw] Smoke Codex failed #54962

Open

github-actions Bot mentioned this pull request Aug 23, 2026

[PR Triage Report] PR Triage Report — Run 32622518826 #55019

Open

Copilot started work on behalf of pelikhan August 23, 2026 06:36 View session

Merge remote-tracking branch 'origin/main' into copilot/add-codex-eng…

04034b0

…ine-support Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot finished work on behalf of pelikhan August 23, 2026 06:53

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