homelab: v0.1 docs, distribution wiring, and version

Completes v0.1: documentation, build/install path, and version stamping.

- cli/VERSION (v0.1.0) stamped into the binary via ldflags.
- cli/README.md rewritten as the homelab overview (verbs + tiers, manifest,
  build, the preserved legacy webhook use-cases).
- docs/adr/0004-0006: why homelab exists (grown in place from infra/cli, not a
  separate repo), v0.1 scope + everything-allowed/tiers-recorded, and the
  work/tf behaviour (native worktree entry, verification-gated auto-land,
  presence-coupled apply).
- setup-devvm.sh builds cli/ -> /usr/local/bin/homelab each provisioning run
  (t3-dispatch pattern), so every devvm user gets the current binary.
- AGENTS.md: discovery pointer under Common Operations.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

cli/README.md

@@ -1,2 +1,68 @@
-# What is this?
-This is a CLI to manipulate files in the terraform repo and commit and push them
+# homelab
+
+`homelab` is the unified, agent-facing CLI for operating this homelab — one
+composable, JSON-capable surface for the operations agents run over and over,
+discovered progressively at runtime. It is grown **in place** from this
+directory (the former `infra-cli`), and the legacy webhook use-cases still work
+(see below).
+
+It encodes *actions*, never *judgment*: methodology (debugging, TDD, review) and
+third-party/owned MCP servers (e.g. phpIPAM) are deliberately out of scope.
+
+## Usage
+
+```
+homelab <command> [args]
+homelab manifest [--json]    # list every verb + its read/write tier (discovery entrypoint)
+homelab version
+```
+
+### v0.1 verbs — the infra inner-loop
+
+| Command | Tier | What it does |
+|---|---|---|
+| `claim <kind>:<name> --purpose "…"` | write | claim a shared resource on the presence board (wraps `scripts/presence`) |
+| `release <kind>:<name>` | write | release a presence claim |
+| `tf plan <stack>` | read | `scripts/tg plan` for a stack (resolved from cwd) |
+| `tf validate <stack>` | read | `scripts/tg validate` |
+| `tf fmt <stack>` | read | `terraform fmt -recursive` on the stack |
+| `tf force-unlock <stack> <lock-id>` | write | release a stuck state lock |
+| `tf apply <stack>` | write | `scripts/tg apply` — auto-claims `stack:<name>`, always releases, warns it's out-of-band |
+| `work start <topic>` | write | create `.worktrees/<topic>` on `<user>/<topic>` off `<remote>/master`; enter with native `EnterWorktree` |
+| `work land [--verify-cmd "…"] [--no-verify]` | write | merge master in → verify → push `HEAD:master` (non-ff retry; PR fallback) |
+| `work clean <topic>` | write | remove a task's worktree + branch (run from the main checkout) |
+
+`tf` resolves the stack dir by walking up from cwd to the infra root and
+delegates to `scripts/tg` (which owns state decrypt/encrypt, the Vault lock, and
+the ingress auth-comment check). git-crypt filter flags are auto-injected on git
+operations in the encrypted infra repo.
+
+**`work land` refuses to push when it cannot verify** (no `--verify-cmd` and no
+auto-detected suite) unless you pass `--no-verify` — landing to master unverified
+must be deliberate. It does not yet block on CI to green (that arrives with the
+ci/deploy watch verbs); it reminds you to follow the pipeline.
+
+Tiers are recorded per verb so a future PreToolUse classifier can auto-allow
+reads / prompt writes; v0.1 allows everything and relies on existing gates
+(permission mode, presence claims, plan approval).
+
+## Build / install
+
+Built from source to `/usr/local/bin/homelab` during devvm provisioning
+(`scripts/workstation/setup-devvm.sh`, the `t3-dispatch` pattern); version is
+stamped from `cli/VERSION` via ldflags. Manual build:
+
+```
+cd cli && go build -ldflags "-X main.version=$(cat VERSION)" -o /usr/local/bin/homelab .
+go test ./...
+```
+
+## Legacy webhook use-cases (preserved)
+
+This binary is also the in-cluster `infra-cli` image. Invocations starting with
+`-use-case=<vpn|setup-openwrt-dns|add-email-alias|...>` fall through to the
+original flag-based path unchanged, so the webhook handler is unaffected.
+
+## Design
+
+See `infra/docs/adr/0004`–`0006` for the architecture decisions.

cli/VERSION

@@ -0,0 +1 @@
+v0.1.0