* feat(canvas): let widget buttons send prompts into web chat
Inline show_widget documents get a sendPrompt(text) bridge: a private
MessageChannel offered to the Control UI before widget code runs. The chat
adopts only the first offer per frame, requires transient user activation,
a visible focused frame, plain text (no slash commands), and rate limits
10 prompts/minute per widget. Accepted prompts run the normal user send
path of the owning chat pane.
* fix(canvas): appease lint/knip/docs gates for widget prompts
Split widget prompt tests into their own file, drive validation and rate
limits through the real port path instead of exported internals, use
addEventListener on the adopted port, and regenerate docs_map.
* fix(canvas): install widget listeners per window for non-isolated tests
Module-boolean listener flags broke in shared vitest workers where each test
file gets a fresh jsdom window; key installation by window instead and give
port flushing more headroom.
* test: shorten loopback token fixtures below secret-scanner thresholds
* feat: carry gateway client capabilities through the CLI loopback backend
CLI-backed model runs now transport the originating client's declared
capabilities along the existing per-field loopback contract: RunCliAgentParams
gains clientCaps, prepare emits OPENCLAW_MCP_CLIENT_CAPS, the loopback header
template forwards x-openclaw-client-caps, the request context parses and
normalizes it (grant-authenticated callers keep ignoring spoofable headers),
and the loopback tool cache keys on a stable caps serialization so capless and
capped requests never share tool lists. Capability-gated tools such as
show_widget now work on CLI backends; the CLI session binding hash includes
caps, consistent with messageProvider. Cron and command-attempt runs stay
capless (fail closed).
Fixes#102577
Adds client-capability-gated tool availability: gateway clients declare
capabilities at connect (new inline-widgets cap), chat.send stamps them into
the run context, and every tool assembly path (embedded runner, queued
followups, Codex app-server harness, plugin-only construction plans) drops
tools whose requiredClientCaps the originating client did not declare. The
Canvas plugin ships the first such tool, show_widget: agents pass SVG or an
HTML fragment plus a title; the plugin hosts it as a bounded, retention-scoped
Canvas document and returns the existing canvas preview handle, which web chat
renders as a sandboxed iframe fitted to the widget's reported content height.
Widget frames never get allow-same-origin (per-preview sandbox ceiling,
including the sidebar path) and the Canvas host serves widget documents with a
CSP sandbox header so direct navigation runs in an opaque origin. Verified
live end-to-end on a Testbox with gpt-5.5 (screenshots on the PR). CLI-backed
model backends do not carry client caps yet and stay fail-closed (#102577).
Closes#101790
