feat: foundations — canonical types, Parse grammar, env DSNs, health, chains

Phase 1 of the majordomo build:
- llm/ canonical contract (messages, parts, tools, capabilities, streaming,
  Model/Provider, error classification)
- health/ clock-injected tracker (threshold bench, exponential capped
  cooldown, reset-on-success)
- root Registry + Parse (verbatim model ids, inline recursive alias
  expansion with cycle detection, chain dedup), LLM_* env-DSN providers
  (go-llm parity: lazy fallback + eager LoadEnv), health-aware chain
  executor behind the Model interface
- provider/fake scriptable test provider; hermetic test suite incl. the
  trailing-thinking chain and foreman:// env loading
- ADRs 0001-0008, CLAUDE.md, README (honest matrix), CI workflow,
  docs/phase-1-design.md

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

progress.md

@@ -0,0 +1,36 @@
+# progress
+
+## 2026-06-10 — Phase 1: foundations, ADRs, skeleton, docs
+
+**Landed:**
+- Module scaffold (Go 1.26), `.gitea/workflows/ci.yaml` (foreman-style
+  gates: build, vet, race tests, tidy-diff), `.env.example`.
+- `llm/` canonical contract: Message/Part (sealed; text+image),
+  Request/Options, Response/Usage/FinishReason, Stream/StreamEvent,
+  Tool/Toolbox (panic-safe Execute), Capabilities (zero-value semantics),
+  Model/Provider interfaces, APIError + transient/permanent Classify.
+- `health/`: clock-injected tracker — consecutive-failure threshold,
+  exponential capped cooldown, reset-on-success, thread-safe; full
+  deterministic test suite (fake clock).
+- Root: Registry (providers/aliases/schemes/health), Parse with the binding
+  grammar (verbatim model ids, inline recursive alias expansion, cycle
+  detection, dedup), LLM_* env-DSN loading (go-llm-parity lazy fallback +
+  eager LoadEnv/New scan), chain executor implementing Model
+  (retry-on-transient, bench-on-repeat, skip-benched, 404-advance,
+  fail-fast-on-auth, joined exhaustion errors). Built-ins register as
+  resolvable stubs until their phases land.
+- `provider/fake/`: scriptable provider (per-model outcome queues, request
+  recording, capabilities overrides, streaming) — the hermetic test rig.
+- ADRs 0001–0008 + index; CLAUDE.md; honest README with pending-marked
+  matrix.
+- Tests cover the two required cases: the trailing-`thinking` chain parse
+  and `LLM_M1=foreman://token@host` loading (plus DSN table, lazy fallback,
+  cycle detection, chain failover/backoff/exhaustion, toolbox execution,
+  error classification).
+
+**Notes:** chain executor landed in Phase 1 (design was settled);
+Phase 2 deepens its test matrix (cooldown re-admission via fake clock,
+alias-in-chain failover, permanent-policy override) and wires anything the
+tests flush out.
+
+**Next:** Phase 2 — exhaustive health/chain test matrix.