RPC and MCP surfaces - PS Agent Bridge

Bridge daemon HTTP endpoints
RPC methods used by desktop adapter
MCP tools (psagent mcp-serve)
Transport notes

Bridge daemon HTTP endpoints

From psagent/src/bridge/daemon.ts:

POST /rpc: CLI adapter JSON-RPC entrypoint.
POST /bridge/register: UXP client registration.
POST /bridge/poll: UXP long-poll for queued requests.
POST /bridge/result: UXP returns request results/errors.
GET /bridge/status: active client + queue + recent events.

RPC methods used by desktop adapter

health
doc.open
doc.manifest
layer.list
ops.apply
render
checkpoint.create
checkpoint.list
checkpoint.restore
events.tail

MCP tools (`psagent mcp-serve`)

Tool	Description
`photoshop_capabilities`	Return adapter mode and capability map
`photoshop_open_document`	Open by local path or URL
`photoshop_get_manifest`	Return document manifest
`photoshop_query_layers`	List layers, optional regex filter
`photoshop_apply_ops`	Apply operation envelope payload
`photoshop_render`	Export active doc to png/jpg
`photoshop_checkpoint_restore`	Restore checkpoint by id
`photoshop_events_tail`	Fetch recent adapter events

Transport notes

psagent mcp-serve uses JSON-RPC over stdio.

Testing and validation

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