Establish Psyche roadmap and agent-readiness foundation

[BunsDev]

Summary

Establish the first public operating layer for Psyche without changing protocol behavior:

• add a root README with status, canonical ownership, architecture map, quick start, and active roadmap;
• add a concise AGENTS.md with risk classes, invariants, protected surfaces, and evidence requirements;
• add contribution, security, and MIT license surfaces;
• add the active 90-day roadmap and proposed OpenCoven protocol-ownership matrix;
• add agent/manifest.yaml as a machine-readable repository/contract/risk declaration;
• add deterministic scripts/agent-bootstrap and scripts/agent-check fast|full entrypoints.

Why

The repository already has a substantial Rust/G2 contract foundation, but a clean-checkout contributor or coding agent has no root onboarding surface, active roadmap, explicit cross-repository ownership map, or single verification interface. This PR addresses that operational gap before protocol v1 publication and downstream adoption.

Scope and risk

Risk: R0/R1 documentation and verification orchestration around an R4 repository.

This PR does not change:

• canonical IDs, records, enums, serialization, or digests;
• migrations, durable storage, dispatch, cancellation, recovery, or conformance behavior;
• existing CI workflow commands;
• npm/Rust package behavior.

Tracking

• Refs Roadmap: establish Psyche as OpenCoven's canonical orchestration protocol #9
• Refs Land Psyche repository and agent-readiness foundation #10
• Refs Define OpenCoven cross-repository protocol ownership and compatibility #12
• Refs Establish Psyche security, release, support, and governance readiness #14

Follow-on protocol artifacts remain in #11; the Psyche Build reference-client canary remains in #13.

Validation performed before push

• Shell syntax: bash -n scripts/agent-bootstrap
• Shell syntax: bash -n scripts/agent-check
• YAML parse and required manifest keys
• GitHub compare: one commit, ten expected added files, zero base divergence

Validation required on the exact PR head

• Existing Rust matrix on Linux/macOS/Windows
• Existing G2 conformance, migration, crash, and evidence checks
• Existing dependency and full-history secret gates
• Existing npm Node 20/22 checks
• Clean-checkout ./scripts/agent-bootstrap
• ./scripts/agent-check fast
• ./scripts/agent-check full
• Review of security-reporting route and canonical-ownership wording

Migration and rollback

No data or protocol migration. Rollback is removal/reversion of the new entrypoint and documentation files. The existing native commands and CI remain unchanged.

Evidence boundary

This PR establishes a plan and verification interface. It does not claim that psyche.protocol.v1 is released or that Psyche Build currently conforms. Those claims remain gated by #11 and #13.