Files
pulse/internal/api
rcourtman 728c42e47b Bring action endpoints onto the agent surface with the agent-stable envelope
Closes the last known gap in the agent substrate. The three
action endpoints (POST /api/actions/plan, /api/actions/{id}/decision,
/api/actions/{id}/execute) previously emitted the platform-wide
APIError shape (stable code under "code", human under "error").
The agent surface uses the inverted shape (stable code under
"error", human under "message"), so adding action capabilities
to the manifest as-is would have forced agents to remember which
envelope each capability uses.

The slice refactors actions.go to emit the agent-stable envelope
across all 42 writeErrorResponse call sites. writeJSONError gains
a writeJSONErrorWithDetails sibling so the 13 calls that pass
field-level reasons (validation failures) preserve that
information under a new optional `details` field. The action
endpoints' JSON shape becomes:

  {"error": "<stable_code>", "message": "<human>",
   "details"?: {"<field>": "<reason>"}}

Frontend impact: zero. Verified that no frontend code consumes
the three action endpoints; the refactor is API-only.

Three new manifest entries (plan_action, decide_action,
execute_action) under a new "action" category, with their
declared error codes pinned per capability. Internal-failure 5xx
codes (audit-store outages, encode failures) are not declared
per capability; agents branch on 5xx generically.
TestContract_AgentSurfaceErrorCodesMatchManifestDeclarations now
audits actions.go alongside the existing two handler files, with
a documented internal-only allowlist for the 5xx codes.

The TestAgentSubstrate_ActionEndpointsEmitAgentStableEnvelope e2e
test exercises one error path through each endpoint via the actual
HTTP boundary, asserting the agent-stable envelope reaches the
wire and the legacy APIError fields (code, status_code, timestamp)
do NOT — drift back would mean the refactor regressed.

The TestContract_ActionDryRunOnlyExecutionErrorJSONSnapshot pin
is updated to match the new envelope shape; the manifest's
category allowlist gains "action".

api-contracts.md documents the new envelope (with details map),
the action governance loop's place in the substrate, the
ai:execute scope distinction from monitoring:write, and the
"manifest projection has a footnote" trade-off: bringing an
existing endpoint into the agent surface may require migrating
its error envelope, but the substrate keeps a single envelope
contract rather than carrying a translation wrapper layer.
agent-lifecycle.md and storage-recovery.md document the action
surface joining the agent paradigm and its zero-new-persistence
posture respectively. AGENT_SUBSTRATE.md's "what it does not do
yet" no longer lists the action surface; it now reflects the
real outstanding items (consumer feedback, an in-Pulse agent
integrations panel, a distribution path for pulse-mcp).
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Internal API Package

This directory contains the API server implementation for Pulse.

Important Note About frontend-modern/

The frontend-modern/ subdirectory that appears here is:

  • AUTO-GENERATED during builds
  • NOT the source code - just a build artifact
  • IN .gitignore - never committed
  • REQUIRED BY GO - The embed directive needs it here

Frontend Development Location

👉 Edit frontend files at: ${PULSE_REPOS_DIR}/pulse/frontend-modern/src/

Why This Structure?

Go's //go:embed directive has limitations:

  1. Cannot use ../ paths to access parent directories
  2. Cannot follow symbolic links
  3. Must embed files within the Go module

This is a known Go limitation and our structure works around it.