agent-collab v6.2.0

Activation release for agent-collab v6.2.0 with the commit-bound, signed, hardened, and notarized native runtime for every architecture in the shipped runtime manifest.

agent-collab 6.2.0 — 2026-08-22

Provider runtime advanced to 4.1.0 (source a5ec708d, signed + notarized,
all nine release-evidence gates true). This is a governance-pool widening
generation: the runtime adds opencode/governance.repository (read-only,
repository authority; identical invariants to the plan action — no
write-authority widening) and lowest-priority governance edges for the
zhipu, moonshot, alibaba, and deepseek lineages, widening the
distinct-family governance pool so Tier-3 peer legs do not dead-end when
frontier CLIs degrade. The Phase-1 governance gate is unchanged — it still
requires a full governance_verdict / approved authority; a widened pool cannot
lower the bar.

Wire-contract disclosure: the descriptor digest advances
4de687b8… → e601a455… as a compatible descriptor evolution — runtime
protocol 4 is unchanged, the 12-action set and every action's
authority/artifact/evidence contract and source-mode map are unchanged; the
projections widen by exactly one base_transport_action
(opencode/governance, 13 → 14) and one valid_action_source_pair
(17 → 18). The co-packaged consumer contract (runtime_client.py cardinality,
runtime-manifest.schema.json digest/version/count pins) moves in lockstep.

Carrier matrix: no carrier moved transport in this release — Gemini (agy),
Grok, Codex, and OpenCode carriers all remain on their existing native
transports; the only routing change is the additive governance-authority
widening above. Antigravity remains async/inbox-only and does not carry runtime
traffic.

This runtime advance ships under the existing, not-yet-tagged v6.2.0 package
version (the project-estimation maintenance evidence is version-bound to 6.2.0),
alongside the coordinator fault-tolerance client changes and the
project-estimation skill.