Add COORDINATION-WP-0005 for prj- drivers and cross-owner mode.

Make coordination-engine aware of project-repository workplans, then
roll that mode into Codex/Claude/Grok agent instructions.

Assistant: grok
Assistant-Session: 01a09dc1-b21e-77e1-919e-fcad2f82b267

workplans/COORDINATION-WP-0005-prj-cross-repo-and-agent-mode.md

@@ -0,0 +1,121 @@
+---
+id: COORDINATION-WP-0005
+type: workplan
+title: "prj- awareness, cross-owner waits, and agent coordination mode"
+domain: communication
+repo: coordination-engine
+status: proposed
+owner: grok
+topic_slug: communication
+flavor: extension
+created: "2026-09-14"
+updated: "2026-09-14"
+related:
+  - COORDINATION-WP-0002
+  - COORDINATION-WP-0003
+  - STATE-WP-0092
+  - CUST-WP-0072
+  - CUST-ADR-005
+origin: residual-policy
+origin_ref: the-custodian/history/20260914-open-workplan-chokepoints.md
+---
+
+# prj- awareness, cross-owner waits, and agent coordination mode
+
+Founder direction 2026-09-14: cross-owner coordination is the top theme
+holding the open-workplan count up. Tackle it with coordination-engine,
+not more inbox `wait` notes. The engine must understand **`prj-`
+workplans** as drivers of cross-repository work (`ADR-005`,
+`project-repository-flavor_v0.1.md`). Agent instructions for Codex,
+Claude, Grok and others change **after** that mode exists, so they
+coordinate instead of stranding.
+
+This repo owns observation, leases, wake-up, checkpoints, safety gates
+and receipts (`COORDINATION-WP-0003`). State Hub remains the work-record
+read model. Product implementation stays in participating repos.
+
+Do not enable live worker injection as a side effect of this plan.
+Do not invent credential vending.
+
+## Model prj- workplans as cross-repo drivers
+
+```task
+id: COORDINATION-WP-0005-T01
+status: todo
+priority: high
+```
+
+Extend `spec/coordination-model-v0.1.md` (or a v0.2 successor) so a
+`CoordinationCase` can be driven by a project-repository workplan:
+`repo_flavor: project` / `prj-*` identity, child workplans in
+participating repos, and `depends_on` edges as commitments rather than
+prose. Distinguish driver (the `prj-` plan) from implementers (product
+repos). Record what is out of scope: the engine does not author
+workplans and does not replace State Hub.
+
+Done when the spec names the driver/implementer split, maps `prj-`
+workplans onto cases/commitments, and has a worked example from an
+existing project repo.
+
+## Cross-owner wait handling mode
+
+```task
+id: COORDINATION-WP-0005-T02
+status: todo
+priority: high
+depends_on: [COORDINATION-WP-0005-T01]
+```
+
+Define the handling mode that replaces “set status wait and hope”:
+observe the foreign owner’s record, open or attach a coordination case,
+lease/wakeup only for selected gita-registered worker targets, checkpoint
+progress, fail closed on missing authorization, and emit a receipt the
+hub can project. Cover the common estate pattern: repo A blocked on repo
+B owner return (security subsystems included). No silent re-assignment
+of another owner’s tasks.
+
+Done when the mode is specified with entry/exit conditions, safety
+gates, and a receipt shape, reconciled with the v0.1 worker-coordination
+service rather than forked.
+
+## State Hub adapter for workplans, flavor, and prj-
+
+```task
+id: COORDINATION-WP-0005-T03
+status: wait
+priority: medium
+depends_on: [COORDINATION-WP-0005-T01, STATE-WP-0092]
+```
+
+Read workplans, `depends_on`, flavor, and repo classification
+(including `prj-`) from State Hub. Residual flavor is not a coordination
+driver unless promoted. Until `STATE-WP-0092` is indexed, stay `wait` on
+that dependency; T01–T02 may proceed on files and classification
+standards.
+
+Done when a local test can build a case from hub JSON for a `prj-`
+workplan and refuse to treat a residual as actionable demand.
+
+## Agent instruction pack
+
+```task
+id: COORDINATION-WP-0005-T04
+status: wait
+priority: high
+depends_on: [COORDINATION-WP-0005-T02]
+```
+
+After the mode exists, update agent instructions so Codex, Claude, Grok
+and other workers can tackle or coordinate cross-repo work:
+
+- `the-custodian/AGENTS.md` and session protocol
+- coordination-engine `AGENTS.md`
+- repo-seed / fleet template snippets used by other repos
+
+Instructions must say: follow the coordination-engine mode; do not mint
+a stranded `wait` when a `prj-` driver exists; do not implement
+residuals; do not message `ops-warden` for secrets. Keep the pack short.
+
+Done when the named files describe the mode with a pointer to the spec,
+and a new session can choose “coordinate via engine” without inventing a
+parallel process.