[Epsirom]

Change

Prepare the coordinated Braid 0.5.1 release for core, Pi, and DSH.

• Running execute and decision nodes can report findings and ask the parent agent to replan through request.requestReplan / the request_replan tool (#106, #107, closes #105).
• Core exports BRAID_VERSION; Pi and DSH fail fast with upgrade/restart guidance on a mismatched core (#103, closes #102).
• Pi/DSH guidance leaves time and tool budgets unset unless the user asks (#104).

This is a patch release: the new replan_requested event and optional replan/requestReplan fields are additions covered by the versioning policy ("New optional fields … may ship in a patch"; consumers provide a fallback for new event types). No migration from 0.5.0 is required.

Updates in this PR:

• All three package versions, both integrations' exact core dependencies, BRAID_VERSION, both REQUIRED_CORE_VERSION constants, and the workspace lockfile.
• CHANGELOG: dated 0.5.1 entry with PR links and author credit.
• README / Pi / DSH README: migration links pinned to v0.5.1; previous-release links now point to v0.5.0.
• ROADMAP: release status and 0.5 implemented changes.

#103, #104, #106, and #107 are the only PRs since v0.5.0, all by @Epsirom, who contributed long before v0.5.0. There are no first-time human contributors. Pi 1.2.0 and DSH 0.2.0-rc.2 remain the tested hosts.

Validation

• npm ci on Node 25.9: passed.
• npm run audit:dependencies: no known vulnerabilities, including development dependencies.
• RELEASE_TAG=v0.5.1 node scripts/check-release.mjs: passed.
• git diff --check: passed.
• Full npm run verify: 269 core, 178 Pi, and 61 DSH tests passed (508 total), all type checks, offline examples, and isolated package installation checks passed (47 core, 19 Pi, 38 DSH packed files).