Promote Alpha to Main

[Yuqing (mydmdm)]

Promotion

Promote the currently integrated Alpha revision to stable main.

• Base: main at c72b101d03eaa294f12fb6d8ea5d4fe32834be77
• Head: alpha at 78a8c0c05dae349e354eafe468d4020722d1f271
• Current comparison: alpha is 45 commits ahead and 0 commits behind main

Included Alpha pull requests

• Add UI-triggered Alpha Canary redeployment #256 — Add UI-triggered Alpha Canary redeployment
• Fix interactive Canary startup logs #257 — Fix interactive Canary startup logs
• fix(preview): restore nested panel scrolling #258 — Restore nested Preview panel scrolling
• Fix duplicate ACP model selector options #260 — Fix duplicate ACP model selector options
• Reclaim ACP Jobs and configurable agentlet capacity #261 — Reclaim ACP Jobs and configurable Agentlet capacity
• Unify Agent and capability Settings surfaces #263 — Unify Agent and capability Settings surfaces
• Separate Utility Agent from conversation selection #264 — Separate Utility Agent from conversation selection
• Configure shared Agentlet connection token #265 — Configure shared Agentlet connection token
• Manage multiple Agentlet devices and device-scoped Profiles #268 — Manage multiple Agentlet devices and device-scoped Profiles
• Fix hostname-era Agentlet Profile compatibility #271 — Fix hostname-era Agentlet Profile compatibility
• Default Move shortcuts off and configure Canary branch #272 — Default Move shortcuts off and configure Canary branch
• Allow Agent Nodes to override Profile working directories #273 — Allow Agent Nodes to override Profile working directories
• Hide Agent Node working-directory controls behind a popover #274 — Hide Agent Node working-directory controls behind a popover
• fix: show inherited Agent Node cwd #275 — Show inherited Agent Node working directories
• Fix cramped connection-token settings layout #278 — Fix cramped connection-token Settings layout

Related issues

This section records relationships without adding automatic close keywords. Partial and umbrella issues remain open until their complete approved scope is delivered.

Delivered and closed

• Add Alpha Canary deployment and automatic upgrade checks #255 — Alpha Canary deployment and automatic upgrade checks
• Reclaim functional ACP Jobs and expose Agentlet capacity controls #235 — Functional ACP Job reclamation and Agentlet capacity controls
• Copilot external Agent model selector shows duplicate and extra models #250 — Duplicate ACP model selector options
• Allow configuring the Agentlet connection token with generated fallback #254 — Configurable Agentlet connection token
• Manage multiple Agentlet devices and device-scoped Profiles #267 — Multi-Agentlet devices, device-scoped Profiles, and hostname-era compatibility
• Allow Agent Nodes to override the selected Profile working directory #269 — Agent Node working-directory override
• Track incremental Move-to and Canary Settings improvements #270 — Move-to default and configurable Canary branch

Delivered; issue closure pending

• Fix cramped Agentlet connection-token Settings layout #276 — Responsive Agentlet connection-token Settings layout

Partially addressed or progressed

• PDF preview intermittently ignores mouse-wheel scrolling #251 — Related nested Preview scrolling fix; the PDF-specific report remains separate
• Follow-up: Agent lifecycle, unified Settings, Windows discovery, and multi-Agentlet enrollment #253 — Agent/Capabilities Settings and Utility Agent milestones; remaining umbrella scope is tracked independently
• Auto-discovered harness Profiles omit the catalogue allow-all launch mode #223 — Typed automatically discovered Profiles default supported auto-approval and coexist with legacy Profiles, but the issue's requested same-ID legacy command migration/shared command-composition plan was superseded rather than fully delivered
• Support per-conversation external Agent launch overrides #210 — Agent Node working-directory override, inheritance, persistence, validation, and realization locking are delivered; standalone Chat support, broader generic overrides, and remaining target-machine/default semantics are not

Already delivered in Main

• Unify server-owned Agent Node lifecycle and decouple binding policy #163 — Closed as completed by feat: unify server-owned Agent Node binding and invocation lifecycle #178. Its server-owned Agent Node lifecycle foundation is already present in main; Allow Agent Nodes to override Profile working directories #273–fix: show inherited Agent Node cwd #275 reuse that contract but do not constitute a new Unify server-owned Agent Node lifecycle and decouple binding policy #163 delivery in this promotion.

Additional focused issue resolved

• Chat panel ignores vertical wheel over nested overflow content #259 — Nested Preview panel vertical wheel handling

Promotion checks

• Confirm the Canary running revision matches promotion head 78a8c0c0.
• Confirm the integrated Alpha behavior has been exercised in the Canary environment.
• Required GitHub checks pass for promotion head 78a8c0c0.
• Review the complete main...alpha diff before manual merge.

Canary use is additional end-to-end evidence only. It does not replace automated tests, CI, review, documentation, or release validation. This PR does not enable auto-merge and must be merged manually after the promotion checks are satisfied.

After merge, synchronize the resulting main history back into alpha if needed so subsequent promotions retain a clear lineage.