feat(miner-governor): build production CodingAgentDriver construction (#5131)

[JSONbored]

Summary

• Closes Build production CodingAgentDriver construction + wire into the create phase #5131 (Wave 3.5 epic Epic: Miner Wave 3.5 — Wire the autonomous loop end-to-end #5130, sub-issue A). Nothing in packages/gittensory-miner ever constructed a coding-agent driver in production — coding-agent-house-rules.js's own header names this explicitly. Adds the missing call site: a real child_process-backed spawn (createRealCliSubprocessSpawn, matching the engine's CliSubprocessSpawnFn contract, mirroring src/selfhost/ai.ts's defaultSpawn) and constructProductionCodingAgentDriver, which resolves MINER_CODING_AGENT_PROVIDER from env and builds a real driver with house-rule enforcement (maintainer: PreToolUse-hook-enforced house rules (deny even under bypassPermissions) #2343) wired in by default via buildHouseRulesAgentSdkHooks.
• Fails closed (throws) when no provider is configured, or when a CLI provider is picked without a real spawn available.

Scope

• The PR title follows type(scope): short summary Conventional Commit format.
• This PR is focused and does not mix unrelated backend, UI, MCP, docs, dependency, and deploy changes.
• This follows CONTRIBUTING.md and does not reintroduce GitHub Pages, VitePress, site/, or CNAME.
• I linked a currently open issue this PR resolves (Closes Build production CodingAgentDriver construction + wire into the create phase #5131).

Validation

• git diff --check
• npm run actionlint — not run (no workflow files touched)
• npm run typecheck
• npm run test:coverage (targeted to the new/related files: test/unit/miner-coding-agent-construction.test.ts 12/12 passing, 100% statement/branch/function/line coverage; also re-ran miner-coding-agent-house-rules.test.ts and miner-attempt-runner.test.ts for regression)
• npm run test:workers — not run (this PR touches only packages/gittensory-miner, no Workers runtime code)
• npm run build:mcp / npm run test:mcp-pack — not run (no MCP server changes)
• npm run ui:openapi:check / npm run ui:lint / npm run ui:typecheck / npm run ui:build — not run (no UI changes)
• npm audit --audit-level=moderate — no new dependencies added
• New or changed behavior has unit/integration tests for new branches, fallback paths, and sanitizer boundaries (spawn success/stderr/spawn-error/timeout paths; provider-unconfigured/unknown-name fail-closed paths; house-rules hooks wired-by-default + config/options threading; construction-without-invoking-spawn)

If any required check was skipped, explain why:

• This PR is scoped entirely to packages/gittensory-miner/lib/ (a Node CLI package with its own node --check-only build/typecheck convention, not the root TS project or the UI workspace) plus one new root test/unit/ file — the UI/Workers/MCP-pack checks above have no surface this diff touches, and were skipped on that basis rather than run and ignored.

Safety

• No secrets, wallet details, hotkeys, coldkeys, user PATs, private keys, raw trust scores, private rankings, or private maintainer evidence are exposed.
• Public GitHub text stays sanitized, low-noise, and does not imply compensation guarantees or optimization tactics.
• Auth, cookie, CORS, GitHub App, Cloudflare, or session changes include negative-path tests. — N/A, no such changes.
• API/OpenAPI/MCP behavior is updated and tested where needed. — N/A, no API/OpenAPI/MCP changes.
• UI changes use live API data or real empty/error/loading states. — N/A, no UI changes.
• UI Evidence — N/A, no visible UI change.
• Public docs/changelogs are updated where needed. — N/A, no user-facing docs affected; changelog is release-prep only.

Notes

• This is the first of 5 dependency-ordered sub-issues under Epic: Miner Wave 3.5 — Wire the autonomous loop end-to-end #5130 (Miner Wave 3.5 — Autonomous Loop Wiring), found via a code-level audit that traced the import graph from bin/gittensory-miner.js outward: Wave 1-3 milestones are all legitimately closed (every closing PR merged, cross-checked via GraphQL), but the actual autonomous loop has zero live entrypoint today. This closes gap feat(docs): add install site and mcp diagnostics #1 of 5 (driver construction); Wire CLI dispatch for the real attempt pipeline (attempt command) #5132 (CLI dispatch), Build a real production runSlopAssessment implementation #5133 (production self-review), Persist governor cross-attempt state (rate-limit, budget, convergence, reputation, self-plagiarism) #5134 (governor persistence), and Build the autonomous repeat/supervising loop (discover → attempt → manage → repeat) #5135 (autonomous repeat loop) remain.

[superagent-security]

Superagent didn't find any vulnerabilities or security issues in this PR.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	gittensory-ui	016e061	Commit Preview URL Branch Preview URL	Jul 12 2026, 04:12 AM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.32%. Comparing base (d1cb4e5) to head (016e061).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5138   +/-   ##
=======================================
  Coverage   94.32%   94.32%           
=======================================
  Files         471      471           
  Lines       39837    39837           
  Branches    14535    14535           
=======================================
  Hits        37576    37576           
  Misses       1583     1583           
  Partials      678      678           

Flag	Coverage Δ
shard-1	46.34% <ø> (-0.01%)	⬇️
shard-2	34.29% <ø> (-0.37%)	⬇️
shard-3	31.05% <ø> (+0.08%)	⬆️
shard-4	33.10% <ø> (+0.23%)	⬆️
shard-5	33.49% <ø> (-0.18%)	⬇️
shard-6	45.17% <ø> (+0.30%)	⬆️

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✅ Gittensory review result - approve/merge recommended

_{Review updated: 2026-07-12 04:17:54 UTC}

4 files · 2 AI reviewers · no blockers · readiness 100/100 · CI green · clean

✅ Suggested Action - Approve/Merge

• safe to merge

Review summary
Adds a new packages/gittensory-miner/lib/coding-agent-construction.js module providing createRealCliSubprocessSpawn (a resolve-never-reject child_process wrapper matching the engine's CliSubprocessSpawnFn contract) and constructProductionCodingAgentDriver (resolves MINER_CODING_AGENT_PROVIDER, fails closed with no provider configured, and wires house-rule PreToolUse hooks in by default via buildHouseRulesAgentSdkHooks). The spawn wrapper correctly clears its timer on both error/close and treats timeout as a resolved timedOut result rather than a rejection; the driver constructor correctly defaults spawn/hooks while letting explicit options override. Notably, the new functions are exported but not called from any production entry point in this diff (no change to bin/gittensory-miner.js or attempt-runner.js), so this closes the sub-issue's construction half of the epic without yet wiring a driver into a live run — consistent with the PR calling itself "sub-issue A" of a larger epic.

Nits — 6 non-blocking

• The PR description claims the driver 'fails closed... when a CLI provider is picked without a real spawn available,' but coding-agent-construction.js:83 always defaults to `options.spawn ?? createRealCliSubprocessSpawn()`, so that failure path is never actually triggered by this code — the description overstates what's implemented here.
• No production call site invokes constructProductionCodingAgentDriver yet (bin/gittensory-miner.js and attempt-runner.js are untouched), so despite the title this doesn't yet make the miner construct a driver at runtime — only a follow-up wiring step would.
• The heavy multi-paragraph JSDoc/file-header commentary (coding-agent-construction.js:1-8, 15-22, 62-71) is far more verbose than the terse-comment convention typically expected; consider trimming to the non-obvious rationale only.
• The external analysis flags depth-5 nesting in the child.on('error'/'close') callbacks (coding-agent-construction.js:45) — cosmetic, but could be flattened with named handler functions if reviewers want lower nesting.
• Consider linking or scheduling the follow-up PR that actually wires constructProductionCodingAgentDriver into attempt-runner.js's deps.driver, since until then this primitive is unreachable from any real run.
• PR author also opened the linked issue — Link an issue that was opened by a different contributor, or provide a rationale for why this self-authored issue represents genuine discovery work.

Signal	Result	Evidence
Code review	✅ No blockers	2 reviewers, synthesized
Linked issue	✅ Linked	#5131
Related work	✅ No active overlap found	No same-issue or scoped active PR overlap found.
Change scope	✅ 20/20	Low review scope from cached public metadata (1 linked issue).
Validation posture	✅ 25/25	PR body includes validation/test evidence.
Contributor workload	✅ 10/10	Author activity: 45 registered-repo PR(s), 37 merged, 414 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	JSONbored; Gittensor profile; 45 PR(s), 414 issue(s).
Gate result	✅ Passing	No configured blocker found.
Improvement	✅ Minor	risk: clean · value: minor — Code changes are accompanied by test evidence. LLM value judgment: moderate — The change adds a well-tested, correctly-scoped construction primitive that closes half of the stated epic goal (build the driver constructor) but leaves the other half (wiring it into a live run) for a later PR, so it's real forward progress but not yet functionally impactful on its own.

Linked issue satisfaction

Partially addressed
The PR adds a real driver-construction module (constructProductionCodingAgentDriver/createRealCliSubprocessSpawn) with solid unit test coverage, directly addressing the missing call site the issue describes, but the diff shown contains no change to attempt-runner.js or any CLI dispatch path actually invoking this new function — so the construction logic exists but is still not wired into a live pr

Review context

• Author: JSONbored
• Role context: owner (maintainer lane)
• Public audience mode: oss maintainer
• Lane context: Repository is configured for direct PR review.
• Public profile languages: Python, TypeScript, Ruby, Go, JavaScript, MDX, Shell, Solidity
• Official Gittensor activity: 45 PR(s), 414 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Treat this as maintainer-lane context rather than normal contributor-lane activity.

Signal definitions

• Related work = same linked issue, overlapping active PRs, or title/path similarity.
• Change scope = cached public metadata such as size labels, draft state, and review-burden hints.
• Validation posture = whether the PR provides enough public validation/test evidence for maintainer review.
• Contributor workload = public contributor activity and cleanup pressure, not a repo-wide quality failure.
• Contributor context = public GitHub/Gittensor identity context; non-Gittensor status is not a blocker.

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_{🟩 Safe / merged · 🟦 Advisory · 🟨 Held for review · 🟥 Blocked / closed}

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