Replace archived OpenCode engine with Crush across runtime, compiler, and workflow assets by Copilot · Pull Request #26819 · github/gh-aw

Copilot · 2026-04-17T05:20:24Z

OpenCode support was still wired as a first-class engine even though OpenCode is archived. This change migrates active engine support to crush and removes opencode from the operational surface.

Engine/runtime migration
- Replaced built-in engine identity from opencode → crush in registry/catalog/constants.
- Renamed engine implementation and MCP integration files to crush_*.
- Updated engine metadata, secret guidance, model env vars, and default CLI version (@charmland/crush, CRUSH_MODEL, GH_AW_MODEL_*_CRUSH).
Compiler + policy updates
- Switched compiler/domain routing paths and engine-specific allowlist logic to crush.
- Updated default domain sets for Crush-specific behavior and provider routing.
- Updated schema/help text and CLI engine completion/token-bootstrap messaging to expose crush.
Workflow/config surface migration
- Replaced OpenCode gateway converter with Crush converter (.crush.json target).
- Updated MCP gateway engine dispatch to call the new Crush converter.
- Renamed smoke workflow from smoke-opencode to smoke-crush and regenerated lockfiles.
- Migrated built-in engine definition markdown from opencode.md to crush.md.
Tests + fixtures alignment
- Updated engine catalog/constant/completion expectations to include crush.
- Renamed engine tests to crush_engine_test.go and aligned assertions.
- Updated golden fixtures for manifest folders/files (.crush, .crush.json).

# before
engine:
  id: opencode

# after
engine:
  id: crush

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/a964814b-4d92-43f7-8c6e-072b1e792779 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot

Pull request overview

Migrates the codebase’s first-class “OpenCode” engine support to the “Crush” engine across runtime/registry wiring, compiler defaults, workflow assets, and user-facing docs.

Changes:

Replaces built-in engine identity from opencode to crush (registry/catalog/constants/tests) and introduces Crush engine definition assets.
Updates compiler lookups/defaults and MCP config rendering to target Crush.
Updates workflow lockfiles and docs to reflect Crush engine/config artifacts and environment variables.

Show a summary per file

File	Description
pkg/workflow/opencode_mcp.go	Removes OpenCode MCP config renderer.
pkg/workflow/crush_mcp.go	Adds Crush MCP config renderer.
pkg/workflow/engine_definition_test.go	Updates built-in engine catalog expectations to include `crush`.
pkg/workflow/engine_definition.go	Updates built-in engine documentation comments from `opencode` to `crush`.
pkg/workflow/engine_catalog_test.go	Updates engine ID expectations for `crush` in catalog tests.
pkg/workflow/data/engines/opencode.md	Removes embedded OpenCode engine definition markdown.
pkg/workflow/data/engines/crush.md	Adds embedded Crush engine definition markdown.
pkg/workflow/compiler_yaml_lookups.go	Adds default version lookup for Crush; updates model-default routing list.
pkg/workflow/compiler_orchestrator_engine.go	Updates orchestrator comments to reference Crush instead of OpenCode.
pkg/workflow/agentic_engine.go	Registers `NewCrushEngine()` instead of `NewOpenCodeEngine()`.
pkg/workflow/README.md	Updates engine registry docs to list `crush`.
pkg/constants/version_constants.go	Replaces DefaultOpenCodeVersion with DefaultCrushVersion.
pkg/constants/constants_test.go	Updates expected engine list to include `crush`.
pkg/constants/constants.go	Renames OpenCode gateway port constant to Crush.
pkg/console/README.md	Updates example error hint to list `crush` instead of `opencode`.
pkg/cli/tokens_bootstrap.go	Updates `--engine` help text to include `crush`.
pkg/cli/completions_test.go	Updates completion expectations to include `crush`.
docs/src/content/docs/setup/cli.md	Updates CLI docs mentioning supported engines to include `crush`.
docs/src/content/docs/reference/faq.md	Updates FAQ engine list to include `crush`.
docs/src/content/docs/reference/environment-variables.md	Renames OpenCode model override env vars to Crush equivalents.
actions/setup/sh/start_mcp_gateway.sh	Switches gateway converter dispatch from OpenCode converter to Crush converter.
.github/workflows/workflow-skill-extractor.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/workflow-normalizer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/workflow-health-manager.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/workflow-generator.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/weekly-safe-outputs-spec-review.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/weekly-issue-summary.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/weekly-editors-health-check.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/weekly-blog-post-writer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/video-analyzer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/update-astro.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/unbloat-docs.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/ubuntu-image-analyzer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/typist.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/tidy.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/test-workflow.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/test-quality-sentinel.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/test-project-url-default.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/test-dispatcher.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/test-create-pr-error-handling.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/terminal-stylist.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/smoke-workflow-call.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/smoke-temporary-id.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/repo-audit-analyzer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/prompt-clustering-analysis.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/notion-issue-summary.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/layout-spec-maintainer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/jsweep.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/issue-triage-agent.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/issue-monster.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/issue-arborist.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/instructions-janitor.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/hourly-ci-cleaner.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/grumpy-reviewer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/gpclean.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/go-pattern-detector.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/go-logger.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/go-fan.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/glossary-maintainer.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/github-remote-mcp-auth-test.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
.github/workflows/github-mcp-tools-report.lock.yml	Updates agent config sparse-checkout/snapshot lists to include Crush artifacts.
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.github/workflows/daily-rendering-scripts-verifier.md	Updates workflow verification guidance to reference `crush` engine.
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Copilot's findings

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Files reviewed: 226/226 changed files
Comments generated: 3

Copilot · 2026-04-17T05:27:26Z

+  crush)
+    echo "Using Crush converter..."
+    bash ${RUNNER_TEMP}/gh-aw/actions/convert_gateway_config_crush.sh


The Crush converter invocation is unquoted (bash ${RUNNER_TEMP}/...), while the other converter paths in this case statement are quoted. Quote the path (and consider quoting the whole argument) to avoid word-splitting/path issues if RUNNER_TEMP ever contains spaces or glob characters.

Copilot · 2026-04-17T05:27:26Z


-	expected := []string{"claude", "codex", "copilot", "gemini", "opencode"}
+	expected := []string{"claude", "codex", "copilot", "gemini", "crush"}
 	catalogIDs := catalog.IDs()


The expected built-in engine ID lists are ordered differently across tests in this file (sorted in TestEngineCatalog_IDs, but not here). Keeping a consistent ordering (e.g., sorted) reduces churn and makes it easier to visually compare expected vs actual sets.

Copilot · 2026-04-17T05:27:26Z

 ```

-**Options:** `--engine` (copilot, claude, codex, gemini, opencode), `--non-interactive`, `--repo`
+**Options:** `--engine` (copilot, claude, codex, gemini, crush), `--non-interactive`, `--repo`


PR description says opencode is removed from the operational surface, but there are still user-facing docs listing opencode as a supported/valid engine (e.g. .github/aw/github-agentic-workflows.md still mentions opencode). Either update those remaining docs in this PR, or clarify in the PR description that some historical/aux docs will continue to reference OpenCode.

github-actions · 2026-04-17T05:27:55Z

Warning

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🏗️ Design Decision Gate — ADR Generated

This PR makes significant changes to core business logic (242 new lines in pkg/) and did not have a linked Architecture Decision Record (ADR).

AI has analyzed the PR diff and generated a draft ADR:

📄 Draft ADR: docs/adr/26819-replace-opencode-engine-with-crush.md

The draft has been committed to this branch. It also marks ADR-25830 (OpenCode engine integration) as Superseded by this decision.

What to do next

Review the draft ADR — verify the Context, Decision, Alternatives, and Consequences sections reflect the team's actual reasoning
Complete any missing sections — in particular, confirm whether [TODO: verify] items exist or whether the alternatives list is exhaustive
Change status from Draft to Accepted once the team is satisfied
Reference the ADR in this PR body by adding a line such as:

ADR: ADR-26819: Replace Archived OpenCode Engine with Crush

Decision Summary

The draft ADR captures the following key points extracted from the diff:

Trigger: OpenCode was archived upstream; keeping it as a first-class engine creates a maintenance liability with no upstream security patches
Decision: Replace opencode engine (from opencode-ai npm, opencode run, opencode.jsonc) with crush engine (from @charmland/crush npm, crush run, .crush.json)
Routing change: Default credential shifts from direct ANTHROPIC_API_KEY → Copilot proxy via COPILOT_GITHUB_TOKEN / OPENAI_API_KEY
Continuity: Same LLM gateway port (10004), same BaseEngine pattern, same provider/model firewall domain resolution logic

📋 ADR Format Reference

An ADR must contain these four sections to be considered complete:

Context — What is the problem? What forces are at play?
Decision — What did you decide? Why?
Alternatives Considered — What else could have been done?
Consequences — What are the trade-offs (positive and negative)?

All ADRs are stored in docs/adr/ as Markdown files numbered by PR number.

References: §24549148853

🏗️ ADR gate enforced by Design Decision Gate 🏗️ · ● 242.9K · ◷

github-actions · 2026-04-17T05:28:42Z

🧪 Test Quality Sentinel Report

Test Quality Score: 94/100

✅ Excellent test quality

Metric	Value
New/modified tests analyzed	10
✅ Design tests (behavioral contracts)	10 (100%)
⚠️ Implementation tests (low value)	0 (0%)
Tests with error/edge cases	8 (80%)
Duplicate test clusters	0
Test inflation detected	No
🚨 Coding-guideline violations	None

Test Classification Details

View full test classification table (10 tests)

Test	File	Classification	Issues Detected
`TestCrushEngine`	`pkg/workflow/crush_engine_test.go`	✅ Design	Comprehensive sub-tests: identity, capabilities, secrets (basic + copilot-requests + MCP + env override), output files, manifest files, secret validation step
`TestCrushEngineInstallation`	`pkg/workflow/crush_engine_test.go`	✅ Design	Edge case: custom command skips installation; firewall path covered
`TestCrushEngineExecution`	`pkg/workflow/crush_engine_test.go`	✅ Design	Covers copilot-requests, model/no-model, MCP, custom command, env overrides, config step ordering
`TestCrushEngineFirewallIntegration`	`pkg/workflow/crush_engine_test.go`	✅ Design	Both enabled/disabled paths; negative assertions on AWF presence
`TestExtractProviderFromModel`	`pkg/workflow/crush_engine_test.go`	✅ Design	Edge cases: empty string, no-slash, case-insensitive prefix
`TestCompleteEngineNames`	`pkg/cli/completions_test.go`	✅ Design	Updated `wantLen` for "c" prefix (3→4) and comment for "empty prefix" case
`TestAgenticEngines`	`pkg/constants/constants_test.go`	✅ Design	Swapped "opencode" → "crush" in expected engines list
`TestEngineCatalog_IDs`	`pkg/workflow/engine_catalog_test.go`	✅ Design	Updated expected sorted IDs list and verifies sort order
`TestEngineCatalog_BuiltInsPresent`	`pkg/workflow/engine_catalog_test.go`	✅ Design	Updated presence-check list
`TestNewEngineCatalog_BuiltIns`	`pkg/workflow/engine_definition_test.go`	✅ Design	Updated table row from `{"opencode","OpenCode","opencode"}` → `{"crush","Crush","crush"}`

Flagged Tests — Requires Review

No tests flagged. All tests are behavioral contracts with comprehensive coverage.

Notable Strengths

crush_engine_test.go was renamed from opencode_engine_test.go (git rename detection: 35 added/35 deleted lines within the 406-line file). The underlying test quality is high: every assertion carries a descriptive message, require.* is used for critical setup, and the test structure covers positive paths, negative paths (.NotContains), feature-flag branches, and firewall-enabled/disabled branches.
No mock libraries used anywhere — all tests exercise real engine implementations.
Build tag //go:build !integration is present on the new file.
Test inflation: crush_engine_test.go (35 net changed lines) vs corresponding production changes (~332 lines across crush_engine.go + crush_mcp.go). Ratio well below 2:1.

Language Support

Tests analyzed:

🐹 Go (*_test.go): 10 tests — all unit (//go:build !integration)
🟨 JavaScript (*.test.cjs, *.test.js): 0 tests

Verdict

✅ Check passed. 0% of new tests are implementation tests (threshold: 30%). Score: 94/100.

📖 Understanding Test Classifications

Design Tests (High Value) verify what the system does:

Assert on observable outputs, return values, or state changes
Cover error paths and boundary conditions
Would catch a behavioral regression if deleted
Remain valid even after internal refactoring

Implementation Tests (Low Value) verify how the system does it:

Assert on internal function calls (mocking internals)
Only test the happy path with typical inputs
Break during legitimate refactoring even when behavior is correct
Give false assurance: they pass even when the system is wrong

Goal: Shift toward tests that describe the system's behavioral contract — the promises it makes to its users and collaborators.

References:

§24549148852

🧪 Test quality analysis by Test Quality Sentinel · ● 931.7K · ◷

github-actions

✅ Test Quality Sentinel: 94/100. Test quality is excellent — 0% of new/modified tests are implementation tests (threshold: 30%). All 10 analyzed tests verify behavioral contracts with comprehensive edge case coverage, proper build tags, descriptive assertion messages, and no mock libraries.

Update Engine entry to reflect the addition of the Crush engine, replacing the previously archived OpenCode engine (#26819). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Add a manual migration entry to the upgrading guide explaining that engine: id: opencode has been removed and users must switch to engine: id: crush. Also update ADR-25830 status from Draft to Superseded since the OpenCode engine was replaced by Crush in #26819. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

The FAQ entry "I'm not using a supported AI Engine" listed only three engines (Copilot, Claude, Codex) but the current supported set is five: Copilot, Claude, Codex, Gemini, and Crush. The Gemini engine was previously added and the Crush engine replaced OpenCode in PR #26819 today. This line was not updated in either PR. The same file already uses the complete five-engine list at line 117. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Copilot AI and others added 2 commits April 17, 2026 04:47

chore: plan crush engine migration

37f966f

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/a964814b-4d92-43f7-8c6e-072b1e792779 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

feat: replace opencode engine support with crush

f6c1b05

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/a964814b-4d92-43f7-8c6e-072b1e792779 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot AI assigned Copilot and pelikhan Apr 17, 2026

Copilot created this pull request from a session on behalf of pelikhan April 17, 2026 05:20 View session

pelikhan marked this pull request as ready for review April 17, 2026 05:21

Copilot AI review requested due to automatic review settings April 17, 2026 05:21

pelikhan merged commit 5f00969 into main Apr 17, 2026
66 of 69 checks passed

pelikhan deleted the copilot/swap-opencode-to-crush branch April 17, 2026 05:22

Copilot started reviewing on behalf of pelikhan April 17, 2026 05:22 View session

Copilot AI reviewed Apr 17, 2026

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github-actions bot approved these changes Apr 17, 2026

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github-actions bot mentioned this pull request Apr 17, 2026

[aw] No-Op Runs #26814

Open

github-actions bot mentioned this pull request Apr 17, 2026

[docs] Update glossary - daily scan #26840

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github-actions bot mentioned this pull request Apr 17, 2026

[docs] Update documentation for features from 2026-04-17 #26845

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github-actions bot mentioned this pull request Apr 17, 2026

[docs] Self-healing documentation fix: update FAQ engine list - 2026-04-17 #26872

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Replace archived OpenCode engine with Crush across runtime, compiler, and workflow assets#26819

Replace archived OpenCode engine with Crush across runtime, compiler, and workflow assets#26819
pelikhan merged 2 commits intomainfrom
copilot/swap-opencode-to-crush

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Pull request overview

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🏗️ Design Decision Gate — ADR Generated

What to do next

Decision Summary

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github-actions bot commented Apr 17, 2026

🧪 Test Quality Sentinel Report

Test Quality Score: 94/100

Test Classification Details

Flagged Tests — Requires Review

Notable Strengths

Language Support

Verdict

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