Why: Freeze L1 skeleton KV keys and honest no-findings placeholder
so Backend can stop stuffing raw task text into progress cards.
Evidence: go test ./... -count=1
Impact: New TaskSummaryView helpers; findings[] still deferred to U2/U3.
Refs: fast-slow-channel-display-u1-plan W1
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: U4 frontend store switches on the event type; the TS union mirrors
the Go EvSurfaceUpdated constant (Core #25) and must include it or the
frontend typecheck rejects the case.
Evidence: go test unchanged (TS-only); frontend tsc in the Dev
workspace after mirror sync.
Impact: Type-only additive.
Refs: Core PR #25; Dev task feature/generative-ui-u4
Why: U4 needs the frontend to render saved surfaces; the Go contract
(Core #25) gains its TypeScript mirror in the single authority so make
contracts regenerates the frontend and UI copies.
Evidence: Mirror regeneration and combined make test in the Dev
workspace after re-pinning.
Impact: Type-only additive change.
Refs: Core PR #25; Dev task feature/generative-ui-u4
Why: PR #25 added the fields to the Go UINode; ts/types.ts is the
single authority that make contracts mirrors into the frontend and UI
repos, so the fields must originate here or the sync reverts manual
mirror edits (CI build caught exactly that).
Evidence: Regenerated mirrors and combined make test run in the Dev
workspace after re-pinning.
Impact: Type-only additive change.
Refs: Core PR #25; Dev task feature/generative-ui-u2
Why: The Generative UI proposal U2 needs a versioned, host-validated
envelope for agent-authored pages before any backend surface exists:
identity/compat/version envelopes, stable per-node ids with source
annotations, catalog-driven spec validation, and the surface.updated
projection event.
Evidence: go vet + go test in this repo (table tests cover a realistic
valid spec from the U1 trial shape, violations, limits, and old-payload
backward compatibility).
Impact: Additive only - UINode gains optional id/source (omitempty),
old card/form paths unaffected; no existing symbol changes.
Refs: Documents proposal 2026-10-10-generative-ui-plugin.md (r2, U2/U1
sections); Dev task feature/generative-ui-u2
Why: frontend and ui contracts.ts are generated from this file by
make contracts; editing the generated copies directly gets reverted by
the next codegen run (the Dev CI build step proves it regenerates).
Evidence: GOWORK=off go test green; the shape matches the Go Usage
fields added earlier.
Impact: additive to the contract mirror.
Refs: Agent-System-Core#2, Agent-System-Frontend#48
Why: the loop now emits Last* and cache token usage; the product run
record needs the same fields for display and accounting (additive JSON,
old records deserialize as zero values).
Evidence: GOWORK=off go build + go test green.
Impact: additive only.
Refs: Agent-Native#35, N3 plan WP6
Why: project facts pointed to a nonexistent Makefile and retained obsolete skeleton status.
Evidence: SELF go test ./... and git diff --check completed in this component worktree.
Impact: documentation only; does not advance the Dev Core gitlink or change public contracts.
Refs: Agent-System-Dev feature/governance-reliability audit remediation
Why: A separately exported ContextSection is unused inside the UI package and pushes the knip ratchet over its baseline.
Evidence: UI knip reported 56 unused exports against baseline 55. The section shape stays on ContextObservation.sections.
Impact: Generated frontend and UI contracts drop the extra export. JSON field names are unchanged.
Refs: .task/feature-sillytavern-review.md
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: Labeled secrets, excluded turns, and candidate replies need fields on the shared message contract, and context snapshots need a section breakdown plus a stable prefix hash.
Evidence: go test ./... in agent-system-core. New fields use omitempty, so existing golden JSON stays the same.
Impact: Clients that ignore unknown fields keep working. Assemblers can now mark a message excluded or as one candidate in a group.
Refs: docs/records/2026-10-04-sillytavern-review.md
Why: a fallback chain can answer with a different model than the one that was requested, and usage has to name the model that actually served.
Evidence: go test .
Impact: the field is omitted when empty, so existing usage JSON stays the same.
Refs: feature/durable-rewind
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: The product needs a session mode and a place to show tool arguments on a confirmation card without inventing a second card type.
Evidence: GOWORK=off go test . passed. New fields use omitempty, so existing golden JSON stays the same.
Impact: Empty permission mode still means the profile policy. Clients that ignore unknown fields keep working.
Refs: feature/permission-hooks
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: The final reply is composed after the work loop, and the automatic end check needs its own part and event so the timeline can show it without mixing it into the user-facing text.
Evidence: go test ./...
Impact: New RunPhase finalizing, PartType check, and run.check. Existing payloads are unchanged.
Refs: feature/final-reply-compose
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: The client only learned about a tool call once execution started, so long argument generation looked like a frozen cursor.
Evidence: go test ./...
Impact: New tool.call.delta and tool.output events; tool.result may include durationMs. Unknown event types stay ignored.
Refs: feature/stream-display-overhaul
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: The workflow executor needs a shared contract for subagent profiles, plugin scripts, and per-step plus whole-run retry caps.
Evidence: go test ./... passed, including the new workflow_def golden.
Impact: New fields are omitempty, so existing workflow JSON still decodes. Kind script is additive.
Refs: feature/agent-harness-p4
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: User overrides of a subagent profile need a place on the shared contract, and empty fields must stay omitted so older modules keep their meaning.
Evidence: go test ./... passed, including the new prompt_module_subagent golden.
Impact: Existing modules serialize the same. Frontend and UI contracts still need a copy of the type.
Refs: feature/agent-harness-p3b
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: Downstream repositories need a versioned public manifest for skills, MCP, knowledge, parsers, agents, channels, and pages without forking the base.
Evidence: go test ./... passed after omitzero on empty scope and backend so the golden plugin_manifest stays stable.
Impact: apiVersion 1.0 remains accepted. New provides fields are optional. Merge without squash so Backend can pin this commit.
Refs: Agent-System-Dev feature/base-extension-roadmap
Why: Downstream repositories need a versioned public manifest for skills, MCP, knowledge, parsers, agents, channels, and pages without forking the base.
Evidence: go test ./... passed after omitzero on empty scope and backend so the golden plugin_manifest stays stable.
Impact: apiVersion 1.0 remains accepted. New provides fields are optional. Scope and backend are omitted when zero.
Refs: docs/proposals/2026-10-01-plugin-contract-v2.md
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: The chat timeline needs a persisted thinking duration, and tool duration already lives on the tool call, so the thinking part had nowhere to put it.
Evidence: go test ./... passes; the message golden now includes durationMs on the thinking part.
Impact: Additive JSON field with omitempty. Existing clients ignore unknown fields.
Refs: feature/chat-timeline-preview
Co-authored-by: Cursor <cursoragent@cursor.com>
Why: project channel convention (pseudo-key project:<projectId>) was
duplicated across runmgr/server/store; centralize so replay envelopes
match live stamping.
Evidence: go test green.
Impact: no behavior change; enables store replay stamping.
Why: D50 approved — the project inbox needs its own SSE stream reusing the
conversation event mechanism via the pseudo-key project:<projectId>; the
envelope stamps project ownership (additive field).
Evidence: conformance golden event_project_stream; go test green.
Impact: additive only (omitempty); consumers ignore unknown fields.
Refs: documents proposal 2026-09-30-card-stream-artifact-unify-project-inbox.md (D50).
Why: the fs tool family (proposal 2026-09-30-file-preview-and-reserved-
capabilities) is implemented but must stay invisible to models and tool
listings until a runtime gate opens it.
Evidence: new bool field with json omitempty; no golden samples carry it;
go test ./... green.
Impact: registries can mark gated tools; servers and runners filter on
it (backend PR in the same task).
Refs: task feature/file-preview-caps.
weichen
