Add ACPX local adapter runtime (#4893)

## Thinking Path

> - Paperclip orchestrates AI-agent companies through a control plane
that can start, supervise, and recover agent runs.
> - Local adapters are the bridge between Paperclip issues and concrete
agent runtimes such as Claude, Codex, and other ACP-compatible tools.
> - The roadmap calls out broader “bring your own agent” and claw-style
agent support, and ACPX gives Paperclip one path to normalize multiple
ACP agents behind a single adapter.
> - The branch needed to become one reviewable PR against current
`paperclipai/paperclip:master`, without carrying stale base conflicts or
generated lockfile churn.
> - This pull request adds an experimental built-in `acpx_local`
adapter, integrates it through the server/CLI/UI adapter surfaces, and
adds regression coverage for runtime execution, skill sync, stream
parsing, diagnostics, and log redaction.
> - The benefit is that Paperclip can run Claude/Codex/custom ACP agents
through ACPX while keeping operator configuration, skills, logging, and
transcript rendering inside the existing adapter model.

## What Changed

- Added `@paperclipai/adapter-acpx-local` with server execution, config
schema, ACPX session handling, CLI formatting, UI config helpers, and
stdout parsing.
- Registered `acpx_local` across CLI, server, shared constants, UI
adapter metadata, adapter capabilities, and agent creation/editing
surfaces.
- Added ACPX runtime execution support with persistent sessions,
local-agent JWT environment handling, skill snapshots, runtime skill
materialization, and isolation/security regressions.
- Added ACPX adapter diagnostics and marked the adapter experimental in
the UI.
- Added command/env secret redaction for resolved command metadata in
adapter-utils, server event storage, and the Agent Detail invocation UI.
- Added Storybook coverage for ACPX config, transcript rendering, and
skill states, plus PR screenshots under `docs/pr-screenshots/pap-2944/`.
- Rebased the branch onto current `public-gh/master`; `pnpm-lock.yaml`
is intentionally not included and there are no migration/schema changes.

## Verification

- `pnpm exec vitest run
packages/adapters/acpx-local/src/server/execute.test.ts
packages/adapters/acpx-local/src/server/test.test.ts
packages/adapters/acpx-local/src/cli/format-event.test.ts
packages/adapters/acpx-local/src/ui/parse-stdout.test.ts
packages/adapter-utils/src/server-utils.test.ts
server/src/__tests__/redaction.test.ts
server/src/__tests__/acpx-local-execute.test.ts
server/src/__tests__/acpx-local-skill-sync.test.ts
server/src/__tests__/acpx-local-adapter-environment.test.ts
server/src/__tests__/adapter-routes.test.ts
server/src/__tests__/agent-skills-routes.test.ts
ui/src/adapters/metadata.test.ts` — 12 files, 87 tests passed.
- `pnpm --filter @paperclipai/adapter-acpx-local typecheck` — passed.
- `pnpm --filter @paperclipai/server typecheck` — passed.
- `pnpm --filter @paperclipai/ui typecheck` — passed.
- Confirmed PR diff does not include `pnpm-lock.yaml`, database schema
files, or migrations.

Screenshots:

![ACPX Claude skills
light](https://github.com/cryppadotta/paperclip-1/blob/PAP-2944-acpx-make-a-claude_local-adapter-that-uses-acpx-instead/docs/pr-screenshots/pap-2944/skills-claude-light.png?raw=true)
![ACPX Claude skills
dark](https://github.com/cryppadotta/paperclip-1/blob/PAP-2944-acpx-make-a-claude_local-adapter-that-uses-acpx-instead/docs/pr-screenshots/pap-2944/skills-claude-dark.png?raw=true)
![ACPX custom skills
light](https://github.com/cryppadotta/paperclip-1/blob/PAP-2944-acpx-make-a-claude_local-adapter-that-uses-acpx-instead/docs/pr-screenshots/pap-2944/skills-custom-light.png?raw=true)

## Risks

- Medium risk: this introduces a new built-in adapter package and
touches runtime execution, adapter registration, agent config, skills,
and transcript rendering.
- ACPX and ACP agent behavior can vary by installed tool versions; the
adapter is marked experimental to set operator expectations.
- `pnpm-lock.yaml` is excluded per repository PR policy, so dependency
lock refresh must be handled by the repo’s automation or maintainers.
- No database migration risk: no schema or migration files changed.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex coding agent based on GPT-5, with repository tool use,
shell execution, git operations, and local verification. Exact hosted
context window was not exposed in this environment.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

ui/src/adapters/acpx-local/index.ts

@@ -0,0 +1,11 @@
+import type { UIAdapterModule } from "../types";
+import { parseAcpxStdoutLine, buildAcpxLocalConfig } from "@paperclipai/adapter-acpx-local/ui";
+import { SchemaConfigFields } from "../schema-config-fields";
+
+export const acpxLocalUIAdapter: UIAdapterModule = {
+  type: "acpx_local",
+  label: "ACPX (local)",
+  parseStdoutLine: parseAcpxStdoutLine,
+  ConfigFields: SchemaConfigFields,
+  buildAdapterConfig: buildAcpxLocalConfig,
+};

ui/src/adapters/adapter-display-registry.ts

@@ -49,9 +49,18 @@ export interface AdapterDisplayInfo {
   recommended?: boolean;
   comingSoon?: boolean;
   disabledLabel?: string;
+  experimental?: boolean;
+  hideFromVisualSelection?: boolean;
 }
 
 const adapterDisplayMap: Record<string, AdapterDisplayInfo> = {
+  acpx_local: {
+    label: "ACPX",
+    description: "Experimental local ACPX multi-agent adapter",
+    icon: Bot,
+    experimental: true,
+    hideFromVisualSelection: true,
+  },
   claude_local: {
     label: "Claude Code",
     description: "Local Claude agent",

ui/src/adapters/metadata.test.ts

@@ -1,5 +1,10 @@
 import { describe, expect, it } from "vitest";
-import { isEnabledAdapterType, listAdapterOptions } from "./metadata";
+import {
+  isEnabledAdapterType,
+  isValidAdapterType,
+  isVisualAdapterChoice,
+  listAdapterOptions,
+} from "./metadata";
 import type { UIAdapterModule } from "./types";
 
 const externalAdapter: UIAdapterModule = {
@@ -22,6 +27,7 @@ describe("adapter metadata", () => {
         label: "external_test",
         comingSoon: false,
         hidden: false,
+        experimental: false,
       },
     ]);
   });
@@ -30,4 +36,27 @@ describe("adapter metadata", () => {
     expect(isEnabledAdapterType("process")).toBe(false);
     expect(isEnabledAdapterType("http")).toBe(false);
   });
-});
+
+  it("keeps ACPX selectable from explicit configuration but out of visual pickers", () => {
+    expect(isEnabledAdapterType("acpx_local")).toBe(true);
+    expect(isValidAdapterType("acpx_local")).toBe(true);
+    expect(isVisualAdapterChoice("acpx_local")).toBe(false);
+
+    expect(
+      listAdapterOptions((type) => type, [
+        {
+          ...externalAdapter,
+          type: "acpx_local",
+        },
+      ]),
+    ).toEqual([
+      {
+        value: "acpx_local",
+        label: "acpx_local",
+        comingSoon: false,
+        hidden: false,
+        experimental: true,
+      },
+    ]);
+  });
+});

ui/src/adapters/metadata.ts

@@ -15,6 +15,7 @@ export interface AdapterOptionMetadata {
   label: string;
   comingSoon: boolean;
   hidden: boolean;
+  experimental: boolean;
 }
 
 export function listKnownAdapterTypes(): string[] {
@@ -43,6 +44,15 @@ export function isValidAdapterType(type: string): boolean {
   return true;
 }
 
+/**
+ * Check whether an adapter should appear in card-style visual pickers.
+ * Experimental adapters can remain selectable from explicit configuration
+ * dropdowns without being recommended during onboarding or setup flows.
+ */
+export function isVisualAdapterChoice(type: string): boolean {
+  return !getAdapterDisplay(type).hideFromVisualSelection;
+}
+
 /**
  * Build option metadata for a list of adapters (for dropdowns).
  * `labelFor` callback allows callers to override labels; defaults to display registry.
@@ -57,6 +67,7 @@ export function listAdapterOptions(
     label: getLabel(adapter.type),
     comingSoon: !!getAdapterDisplay(adapter.type).comingSoon,
     hidden: isAdapterTypeHidden(adapter.type),
+    experimental: !!getAdapterDisplay(adapter.type).experimental,
   }));
 }
 

ui/src/adapters/registry.ts

@@ -1,4 +1,5 @@
 import type { UIAdapterModule } from "./types";
+import { acpxLocalUIAdapter } from "./acpx-local";
 import { claudeLocalUIAdapter } from "./claude-local";
 import { codexLocalUIAdapter } from "./codex-local";
 import { cursorLocalUIAdapter } from "./cursor";
@@ -49,6 +50,7 @@ setDynamicParserResultNotifier(notifyAdapterChange);
 
 function registerBuiltInUIAdapters() {
   for (const adapter of [
+    acpxLocalUIAdapter,
     claudeLocalUIAdapter,
     codexLocalUIAdapter,
     geminiLocalUIAdapter,

ui/src/adapters/use-adapter-capabilities.ts

@@ -16,6 +16,7 @@ const ALL_FALSE: AdapterCapabilities = {
  * return correct values on first render before the /api/adapters call resolves.
  */
 const KNOWN_DEFAULTS: Record<string, AdapterCapabilities> = {
+  acpx_local: { supportsInstructionsBundle: true, supportsSkills: true, supportsLocalAgentJwt: true, requiresMaterializedRuntimeSkills: false, supportsModelProfiles: false },
   claude_local: { supportsInstructionsBundle: true, supportsSkills: true, supportsLocalAgentJwt: true, requiresMaterializedRuntimeSkills: false, supportsModelProfiles: true },
   codex_local: { supportsInstructionsBundle: true, supportsSkills: true, supportsLocalAgentJwt: true, requiresMaterializedRuntimeSkills: false, supportsModelProfiles: true },
   cursor: { supportsInstructionsBundle: true, supportsSkills: true, supportsLocalAgentJwt: true, requiresMaterializedRuntimeSkills: true, supportsModelProfiles: true },