docs: handoff-80 + docs direct-push carve-out (ADR-0059 Amendment 1)

Session handoff covering the clause-concept-hints feature (ADR-0058, #42) and
the working-method establishment (ADR-0059, #41; fixes #43/#44). Records the
docs direct-push carve-out: handoff/session docs and small docs amendments are
owner-direct-pushed to main, because a docs-only PR posts no ci/gate run
(paths-ignored) and stalls on the required check. Amends CLAUDE.md, ADR-0059
(Amendment 1), and its README index row.

CLAUDE.md

@@ -303,6 +303,14 @@ operational rules an agent must follow:
   or merge.
 - **Paste the `/runda` / DA review into the PR** so the public repo carries
   the audit trail.
+- **Handoff / session docs are owner-direct-pushed to `main`, not PR'd** (a
+  deliberate extension of the reservation-ledger carve-out). Reason: a
+  docs-only change is `paths-ignore`d by `ci.yaml`, so it posts no `ci / gate`
+  run — and branch protection *requires* `ci / gate*`, so a docs-only PR
+  stalls forever on a required check that never arrives. Direct-push (owner
+  is whitelisted, docs paths burn no CI) sidesteps that. The same applies to
+  small docs amendments like this one. If docs-via-PR is ever wanted, first
+  add a "skipped → success" gate shim (or drop the docs paths-ignore).
 
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