# Continuous Improvement Loop

Go Micro is an agent harness. This file defines the **autonomous loop that builds
it** — the framework's own thesis (an agent operating a system) pointed at itself.
Claude Code drives the loop; Codex executes scoped tasks; the human sets direction
and can stop or revert anything at any time.

> **North Star.** Every increment must advance the thesis in [`THESIS.md`](THESIS.md):
> a holistic agent harness and service framework encapsulating the lifecycle of
> **services → agents → workflows**. Judge each change against it — work that
> doesn't move toward that lifecycle isn't an improvement, however clean.

## The pipeline (planner → generator → evaluator)

The development process is an operational instance of the long-running-agent
harness pattern ([Anthropic on harness design](https://www.anthropic.com/engineering/harness-design-long-running-apps)) —
a planner, a generator, and a *separate* evaluator — distributed across GitHub
Actions instead of subagents. Each role is a workflow:

| Role | Workflow (action name) | What it does |
|------|------------------------|--------------|
| **Planner** | `loop-planner.yml` — *Loop: Planner* | Tracks live state, prioritizes the roadmap + an internal scan, and maintains the ranked queue in [`.github/loop/PRIORITIES.md`](../../.github/loop/PRIORITIES.md). Decides *what*. |
| **Generator** | `loop-builder.yml` — *Loop: Builder (Generator)* | Builds the top open queue item as a single-concern PR (via Codex) and self-merges on green CI. Does the work. |
| **Evaluator** | `harness.yml` — *Harness (E2E)*, plus the CI gate (`tests.yaml`, `lint.yaml`, `govulncheck.yml`) | Grades every change: the mock harness + unit/lint + reachable-CVE scan on each push/PR, and real-model conformance hourly. A *separate* grader — never the generator judging itself. |
| **Evaluator → feedback** | `loop-triage.yml` — *Loop: Triage (Evaluator feedback)* | When a gate workflow (Lint, Run Tests, govulncheck, or the harness) fails on a non-PR run, root-causes, dedupes, and files scoped fix issues back into the planner's queue. The hill-climbing feedback path. |
| **Coherence** | `loop-coherence.yml` — *Loop: Coherence* | Keeps README/website/docs/blog aligned with the North Star, keeps `CHANGELOG.md` living (reconciling `[Unreleased]` against merged PRs and rolling it into version headings as tags cut), and drafts the changelog blog post. |
| **Security** | `loop-security.yml` — *Loop: Security* | Weekly vulnerability audit of the attack surface (MCP/A2A gateways, x402, auth, provider URLs, agent tool loop, deps via `govulncheck`). Files `security` issues; **never auto-merges** fixes and **never publishes exploit detail** in public issues (responsible disclosure); risky fixes are `needs-human`. |
| **Release** | `loop-release.yml` — *Loop: Release (daily patch)* | Cuts a daily patch tag when master has new commits, so the *installable* framework tracks the loop's improvements (triggers `release.yml`/goreleaser). Minor/major bumps stay with the human. |

Generation is separated from evaluation on purpose: an agent grading its own work
reliably over-rates it, so **CI and the harness — not the builder — are the gate**.
The human sets direction and owns the calls that need taste (see Guardrails).

> **Go Micro dogfoods its own tool.** These `.github/workflows/loop-*.yml` files
> are generated by [`micro loop`](../../cmd/micro/loop) (`micro loop init --roles all`).
> The workflows are the *mechanism*; each role's instruction is the editable
> *policy* in [`.github/loop/prompts/`](../../.github/loop/prompts), and the
> direction/queue live in [`.github/loop/NORTH_STAR.md`](../../.github/loop/NORTH_STAR.md)
> and [`.github/loop/PRIORITIES.md`](../../.github/loop/PRIORITIES.md). To change
> what a role does, edit its prompt — not the YAML. Re-run `micro loop init
> --roles all --force` to regenerate the workflow mechanics (it won't clobber the
> North Star, queue, or prompts).

## Autonomy

Full autonomy, **no approval gates**. Each increment: Claude Code picks the work,
implements it (or dispatches Codex), opens a PR, and **merges it** — including
reviewing and merging Codex's PRs. The only gate is **correctness**: `go build`,
`go test`, and `golangci-lint` must be green (that's not an approval, it's not
shipping broken code).

Transparency replaces approval: every increment ends with a one-line digest, and
every change is a small, reversible, single-concern PR the human can revert.

## What counts as an improvement

Grounded in real signal, never speculative rewrites. Each cycle draws from:

1. **Roadmap** — the Now/Next items in `ROADMAP.md` (harness depth: durable runs,
   observability, streaming, human-in-the-loop; hardening: resilience, conformance).
2. **Open issues** — the scoped backlog (e.g. #3010–#3014).
3. **Improvement radar** — a scan each cycle for: missing/weak tests, lint or
   quality issues, docs/code drift, and DX friction.
4. **Dogfooding** — actually build with the harness (`micro new` → `run` → `chat`,
   an agent + a flow) and fix what hurts. Friction found here is high-signal.

## The cycle (one increment)

1. Sync `master`.
2. If a Codex PR is open and CI-green → review (diff + gates + correctness vs its
   issue) and merge it.
3. Else pick the single highest-value item from the sources above.
4. Implement it, or dispatch to Codex (`@codex <instruction>` on the issue) if it's
   a well-scoped chunk and Codex is free. **Codex is serial — one task at a time.**
5. Verify `build`/`test`/`lint` locally.
6. Open a PR (one concern) and merge it.
7. Post a one-line digest; refresh the backlog from the radar.

## Roles

- **Claude Code** — orchestrator, implementer, reviewer, integrator, merger.
- **Codex** — serial builder for well-scoped chunks, dispatched via `@codex`.
- **Human** — sets direction; owns brand/positioning copy and breaking public-API
  decisions; can stop or revert anything.

## Guardrails

- One concern per PR; small and reversible.
- Stay on `claude/*` branches (Codex on `codex/*`); never two agents on one branch;
  base PRs on `master` (don't stack on an in-flight branch). See `CODEX.md`.
- **Off-limits without the human:** brand/positioning/marketing copy, breaking
  public API changes, product-default changes with broad behavioral impact, new
  dependencies, architectural rewrites. The loop proposes these in the digest; it
  does not merge them autonomously.

## Scheduling

- **In-session cron** (`CronCreate`) — runs increments while this Claude session is
  alive. Convenient, but the remote environment is reclaimed on inactivity and
  recurring jobs expire after 7 days, so it is **not** a durable scheduler.
- **GitHub Actions (durable)** — a scheduled workflow that runs the loop
  independently of any session. This is the real backbone; it opens a fresh
  tracking issue for each increment and dispatches Codex there. It needs a
  `CODEX_TRIGGER_TOKEN` repo secret from a user account Codex responds to;
  without that secret the workflow deliberately no-ops to avoid ignored bot
  comments. See `.github/workflows/loop-builder.yml` and the mechanics
  below.

## How the durable loop works (mechanics)

Hard-won wiring — change any one piece and the loop silently stops producing
merged PRs. Each scheduled run:

1. **Opens a fresh issue per increment** (`Continuous improvement increment #N`)
   and posts the `@codex` instruction on it. *Why a fresh issue:* Codex derives
   its branch name from the triggering issue's context, so re-using one tracker
   issue collapses every run onto one branch name and only the first PR opens —
   the rest collide and silently fail.
2. **Posts as a user, not the Actions bot.** Codex ignores `@codex` comments
   authored by `github-actions[bot]`, so the dispatch uses `CODEX_TRIGGER_TOKEN`
   (a PAT for a user account Codex follows). No token → the step no-ops.
3. **Codex opens the PR itself with `gh` — never `make_pr`.** In the Codex Cloud
   sandbox the `make_pr` tool is a **no-op stub**: it records the PR title/body
   for the manual "Create PR" button and never pushes a branch or calls the API.
   So the dispatch and [`AGENTS.md`](../../AGENTS.md) tell Codex to do it by hand:

   ```sh
   git switch -c codex/increment-<issue>     # unique branch, codex/ prefix
   git push -u origin codex/increment-<issue>
   gh pr create --base master --label codex --title "…" --body "… Closes #<issue>"
   gh pr merge  --squash --auto --delete-branch
   ```

   This requires the Codex setup script to install `gh` and run `gh auth
   setup-git` (so `git push` is authenticated) with a write-scoped token.
4. **Merges via GitHub native auto-merge, gated by branch protection.** `master`
   requires the CI status checks (build, tests, golangci-lint) and **0 approving
   reviews**. `gh pr merge --auto` enables auto-merge; GitHub lands the PR the
   moment checks pass and deletes the branch. `Closes #<issue>` auto-closes the
   tracking issue. There is **no merge sweep workflow** — branch protection is
   the gate.

### Do-not-break list

- **Don't re-add required approvals** to `master` — it blocks every autonomous
  merge. The intended gate is **green CI only**.
- **Don't point the dispatch at one standing tracker issue** — one issue per run.
- **Don't tell Codex to use `make_pr`** (or imply a token "isn't a substitute"):
  it cannot open a PR. `gh` is the only path.
- **Don't manually re-implement a Codex increment during the summary→PR lag**
  (Codex posts an optimistic "opened a PR" comment ~30–45 min before the PR
  actually appears). Re-doing it creates duplicate PRs and stale branches that
  then block the next run. Wait for the PR, or let it ride.

## Overseer passes (DevRel + Architect)

The hourly loop ships increments; two periodic passes keep the *whole* heading in
the right direction. Both use the same mechanism (fresh issue → `@codex` →
output) but produce direction and coherence, not just code.

- **Coherence (DevRel) — daily** (`.github/workflows/loop-coherence.yml`, prompt `.github/loop/prompts/coherence.md`). Audits the public
  surface (README, website landing + docs, blog) for coherence with the North
  Star, README crispness, and blog-worthy material. It also keeps `CHANGELOG.md`
  living: each run reconciles the `[Unreleased]` section against the PRs that
  actually merged (Keep-a-Changelog format, user-facing entries only — internal
  loop/CI churn is skipped), and rolls `[Unreleased]` into a dated version
  heading whenever a new `v6.MINOR.PATCH` tag has been cut (by `loop-release`).
  When enough user-facing work has accumulated (roughly weekly, not a near-empty
  post every day) it also drafts a "what's new" changelog blog post narrating it.
  **Autonomy boundary:** safe factual-alignment and crispness fixes — *including
  the `CHANGELOG.md` upkeep* — auto-merge like any increment; brand/positioning
  copy and the changelog blog post are opened as a PR (or surfaced in the report)
  and left for the human to review/merge — blog voice stays with the human.
- **Planner (Architect) — continuous (hourly)** (`.github/workflows/loop-planner.yml`, prompt `.github/loop/prompts/planner.md`).
  The *founder lens*, running alongside the builders. Each run it **tracks live
  state** (what just merged, what's in flight), **prioritizes the roadmap**
  (`ROADMAP.md`, Now → Next → Later) against an internal scan (lifecycle gaps, API
  coherence and seams, dev-UX friction, missing pieces, drift/realignment), and
  **maintains the ranked queue** in [`.github/loop/PRIORITIES.md`](../../.github/loop/PRIORITIES.md) — re-ranking
  to reflect reality, backing each top item with a scoped issue, and posting an
  assessment. It runs at `:59`, just before the `:29` increment, so it
  re-prioritizes and *then* the loop builds the new top. **Its output is the
  prioritized queue plus the assessment** — it does **not** make breaking or
  architectural changes itself (those stay with the human). To avoid churn it only
  opens a PR when the ranking actually changes.

The two loops are coupled through `PRIORITIES.md`: the **architect decides *what***
(roadmap + internal priorities, ranked, issue-linked) and the **hourly increment
loop builds the top open item** — falling back to its own judgment only if the
queue is empty. DevRel keeps the public story honest alongside. So work is
roadmap-driven by default, not a fresh guess every hour. Cadence is tunable in each
workflow's `cron`; the human can reorder `PRIORITIES.md` or its issues at any time
to redirect. Codex is serial, so these passes queue behind any in-flight increment.

## Failure triage (the feedback loop)

The loop also closes on its own failures. `.github/workflows/loop-triage.yml`
fires when a gate workflow — **Lint**, **Run Tests**, or the provider-conformance
**Harness (E2E)** — finishes with `conclusion: failure` on a non-PR run (so a red
lint or test on `master`, not just a harness failure, becomes a fix issue). It
dispatches Codex to **triage** the failing run: read the logs, root-cause each
distinct failure, **dedupe** against open issues (comment "recurred" rather than
filing a duplicate), and file a scoped `codex`/`enhancement` issue for each genuine,
self-contained defect — which the increment loop then builds and the next run
verifies. Genuine transient flakes (live-model latency, provider outages) are
ignored; anything needing a breaking or architectural change is escalated as
`needs-human` instead of auto-built. This is
the hill-climbing layer: CI/harness failures become fixes with no human in the
middle, short of a decision that's genuinely the human's.

## Stop / redirect

- In-session: `CronDelete <id>` (or end the session).
- Durable: disable/delete the workflow.
- Or just tell Claude Code to pause or change focus — direction always wins over
  the loop.