docs(agents): plan full-playability Rust client programme

[blakinio]

Purpose

Turn the broad goal of a fully playable Oteryn Rust client into a durable, architecture-compliant multi-agent programme under the current Prompting Standard.

Scope

• define functional parity and milestone acceptance from technical login through production release;
• add one compact architecture handoff for future workers;
• add a living capability matrix of current proven/partial/absent/unknown state;
• define sole contract producers, shared-path leases, merge ordering and safe parallelism;
• authorize only a first docs/evidence-only P0 discovery wave after explicit launch gates;
• add a compliant coordinator prompt and five independent worker prompts.

Current foundation

• post-remediation audit PR docs(audit): verify post-remediation closure #133 and archive PR docs(task): archive post-remediation closure audit #134 are merged;
• audited secret-owner completion PR fix(secrets): complete callback and credential ownership #136 and archive PR docs(task): archive secret-owner completion #137 are merged;
• OTC2-AUD-001 through OTC2-AUD-004 are closed within their documented boundaries;
• the plan accurately retains synthetic-only and unknown deployment/gameplay limits;
• P0 still cannot launch before this plan and its separate lifecycle archive merge plus a fresh coordinator preflight.

Safety

• implementation is not authorized;
• no Rust/C++/Lua/OTUI source, manifest, lockfile, workflow, architecture checker or producer repository path remains in the diff;
• no PR feat(ui): prototype Oteryn login shell #23-owned shared path change;
• no proprietary assets, private captures, credentials or official-service automation;
• existing W1-W7 prompts are not relaunched.

Exact-head validation

Head 7d5151e6bd57473173927a65a14456549ad396a2 passed:

• task checkpoint validator and Prompting Standard review;
• Rust Client run 30704934145;
• Windows job 91382303628: locked metadata, rustfmt, strict Clippy, complete workspace tests and real-workspace architecture validation;
• Supply Chain job 91382303617;
• repository CI run 30704934228;
• CI / Required job 91382407061;
• exact changed-file review: twelve declared documentation paths only;
• comments, reviews and unresolved review threads: none.

Deliverables

• oteryn-client/docs/agents/playability/PROGRAM_CHARTER.md
• ARCHITECTURE_HANDOFF.md
• CAPABILITY_MATRIX.md
• DEPENDENCY_AND_PARALLELISM.md
• WAVE_P0_DISCOVERY.md
• coordinator and five bounded P0 worker prompts.

Task

OTC2-20260801-full-playability-program-plan