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>

packages/adapters/acpx-local/src/ui/build-config.ts

@@ -0,0 +1,139 @@
+import type { CreateConfigValues } from "@paperclipai/adapter-utils";
+import {
+  DEFAULT_ACPX_LOCAL_AGENT,
+  DEFAULT_ACPX_LOCAL_MODE,
+  DEFAULT_ACPX_LOCAL_NON_INTERACTIVE_PERMISSIONS,
+  DEFAULT_ACPX_LOCAL_PERMISSION_MODE,
+  DEFAULT_ACPX_LOCAL_TIMEOUT_SEC,
+} from "../index.js";
+
+function parseCommaArgs(value: string): string[] {
+  return value
+    .split(",")
+    .map((item) => item.trim())
+    .filter(Boolean);
+}
+
+function parseEnvVars(text: string): Record<string, string> {
+  const env: Record<string, string> = {};
+  for (const line of text.split(/\r?\n/)) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith("#")) continue;
+    const eq = trimmed.indexOf("=");
+    if (eq <= 0) continue;
+    const key = trimmed.slice(0, eq).trim();
+    const value = trimmed.slice(eq + 1);
+    if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(key)) continue;
+    env[key] = value;
+  }
+  return env;
+}
+
+function parseEnvBindings(bindings: unknown): Record<string, unknown> {
+  if (typeof bindings !== "object" || bindings === null || Array.isArray(bindings)) return {};
+  const env: Record<string, unknown> = {};
+  for (const [key, raw] of Object.entries(bindings)) {
+    if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(key)) continue;
+    if (typeof raw === "string") {
+      env[key] = { type: "plain", value: raw };
+      continue;
+    }
+    if (typeof raw !== "object" || raw === null || Array.isArray(raw)) continue;
+    const rec = raw as Record<string, unknown>;
+    if (rec.type === "plain" && typeof rec.value === "string") {
+      env[key] = { type: "plain", value: rec.value };
+      continue;
+    }
+    if (rec.type === "secret_ref" && typeof rec.secretId === "string") {
+      env[key] = {
+        type: "secret_ref",
+        secretId: rec.secretId,
+        ...(typeof rec.version === "number" || rec.version === "latest"
+          ? { version: rec.version }
+          : {}),
+      };
+    }
+  }
+  return env;
+}
+
+function parseJsonObject(text: string): Record<string, unknown> | null {
+  const trimmed = text.trim();
+  if (!trimmed) return null;
+  try {
+    const parsed = JSON.parse(trimmed);
+    if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed)) return null;
+    return parsed as Record<string, unknown>;
+  } catch {
+    return null;
+  }
+}
+
+function readNumber(value: unknown, fallback: number): number {
+  if (typeof value === "number" && Number.isFinite(value)) return value;
+  if (typeof value === "string" && value.trim()) {
+    const parsed = Number(value);
+    if (Number.isFinite(parsed)) return parsed;
+  }
+  return fallback;
+}
+
+export function buildAcpxLocalConfig(v: CreateConfigValues): Record<string, unknown> {
+  const schemaValues = v.adapterSchemaValues ?? {};
+  const ac: Record<string, unknown> = {
+    agent: schemaValues.agent || DEFAULT_ACPX_LOCAL_AGENT,
+    mode: schemaValues.mode || DEFAULT_ACPX_LOCAL_MODE,
+    permissionMode: schemaValues.permissionMode || DEFAULT_ACPX_LOCAL_PERMISSION_MODE,
+    nonInteractivePermissions:
+      schemaValues.nonInteractivePermissions || DEFAULT_ACPX_LOCAL_NON_INTERACTIVE_PERMISSIONS,
+    timeoutSec: readNumber(schemaValues.timeoutSec, DEFAULT_ACPX_LOCAL_TIMEOUT_SEC),
+  };
+
+  for (const key of [
+    "agentCommand",
+    "cwd",
+    "stateDir",
+    "instructionsFilePath",
+    "promptTemplate",
+    "bootstrapPromptTemplate",
+  ]) {
+    const value = schemaValues[key];
+    if (typeof value === "string" && value.trim()) ac[key] = value.trim();
+  }
+
+  if (!ac.cwd && v.cwd) ac.cwd = v.cwd;
+  if (!ac.instructionsFilePath && v.instructionsFilePath) ac.instructionsFilePath = v.instructionsFilePath;
+  if (!ac.promptTemplate && v.promptTemplate) ac.promptTemplate = v.promptTemplate;
+  if (!ac.bootstrapPromptTemplate && v.bootstrapPrompt) ac.bootstrapPromptTemplate = v.bootstrapPrompt;
+
+  const env = parseEnvBindings(v.envBindings);
+  const legacy = parseEnvVars(v.envVars);
+  for (const [key, value] of Object.entries(legacy)) {
+    if (!Object.prototype.hasOwnProperty.call(env, key)) {
+      env[key] = { type: "plain", value };
+    }
+  }
+  if (typeof schemaValues.env === "string") {
+    const schemaEnv = parseJsonObject(schemaValues.env);
+    if (schemaEnv) Object.assign(env, schemaEnv);
+  } else if (typeof schemaValues.env === "object" && schemaValues.env !== null && !Array.isArray(schemaValues.env)) {
+    Object.assign(env, schemaValues.env as Record<string, unknown>);
+  }
+  if (Object.keys(env).length > 0) ac.env = env;
+
+  if (v.workspaceStrategyType === "git_worktree") {
+    ac.workspaceStrategy = {
+      type: "git_worktree",
+      ...(v.workspaceBaseRef ? { baseRef: v.workspaceBaseRef } : {}),
+      ...(v.workspaceBranchTemplate ? { branchTemplate: v.workspaceBranchTemplate } : {}),
+      ...(v.worktreeParentDir ? { worktreeParentDir: v.worktreeParentDir } : {}),
+    };
+  }
+  const runtimeServices = parseJsonObject(v.runtimeServicesJson ?? "");
+  if (runtimeServices && Array.isArray(runtimeServices.services)) {
+    ac.workspaceRuntime = runtimeServices;
+  }
+  if (v.command) ac.command = v.command;
+  if (v.extraArgs) ac.extraArgs = parseCommaArgs(v.extraArgs);
+  return ac;
+}

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

@@ -0,0 +1,2 @@
+export { parseAcpxStdoutLine } from "./parse-stdout.js";
+export { buildAcpxLocalConfig } from "./build-config.js";

packages/adapters/acpx-local/src/ui/parse-stdout.test.ts

@@ -0,0 +1,160 @@
+import { describe, expect, it } from "vitest";
+import { parseAcpxStdoutLine } from "./parse-stdout.js";
+
+const TS = "2026-04-30T00:00:00.000Z";
+
+function emit(payload: Record<string, unknown>): string {
+  return JSON.stringify(payload);
+}
+
+describe("parseAcpxStdoutLine", () => {
+  it("renders an init entry from acpx.session", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({
+        type: "acpx.session",
+        agent: "claude",
+        acpSessionId: "acp-1",
+        runtimeSessionName: "runtime-1",
+        mode: "persistent",
+        permissionMode: "approve-all",
+      }),
+      TS,
+    );
+    expect(entries).toEqual([
+      {
+        kind: "init",
+        ts: TS,
+        model: "claude (persistent / approve-all)",
+        sessionId: "acp-1",
+      },
+    ]);
+  });
+
+  it("routes output text_delta to the assistant transcript", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({ type: "acpx.text_delta", text: "hello", channel: "output", tag: "agent_message_chunk" }),
+      TS,
+    );
+    expect(entries).toEqual([
+      { kind: "assistant", ts: TS, text: "hello", delta: true },
+    ]);
+  });
+
+  it("routes thought text_delta to the thinking transcript", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({ type: "acpx.text_delta", text: "thinking…", channel: "thought" }),
+      TS,
+    );
+    expect(entries).toEqual([
+      { kind: "thinking", ts: TS, text: "thinking…", delta: true },
+    ]);
+  });
+
+  it("falls back to stream when channel is missing", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({ type: "acpx.text_delta", text: "thinking…", stream: "thought" }),
+      TS,
+    );
+    expect(entries[0]).toMatchObject({ kind: "thinking" });
+  });
+
+  it("renders status events as system text with optional ctx usage", () => {
+    expect(
+      parseAcpxStdoutLine(
+        emit({ type: "acpx.status", text: "thinking", tag: "agent_thought_chunk" }),
+        TS,
+      ),
+    ).toEqual([{ kind: "system", ts: TS, text: "thinking" }]);
+
+    expect(
+      parseAcpxStdoutLine(
+        emit({ type: "acpx.status", tag: "context_window", used: 12000, size: 200000 }),
+        TS,
+      ),
+    ).toEqual([{ kind: "system", ts: TS, text: "context_window (12000/200000 ctx)" }]);
+  });
+
+  it("emits a tool_call entry that preserves toolCallId, status, and input", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({
+        type: "acpx.tool_call",
+        name: "read",
+        toolCallId: "tool-1",
+        status: "running",
+        text: "read README.md",
+      }),
+      TS,
+    );
+    expect(entries).toEqual([
+      {
+        kind: "tool_call",
+        ts: TS,
+        name: "read",
+        toolUseId: "tool-1",
+        input: { text: "read README.md", status: "running" },
+      },
+    ]);
+  });
+
+  it("emits a paired tool_result entry when a tool_call reports terminal status", () => {
+    const completed = parseAcpxStdoutLine(
+      emit({
+        type: "acpx.tool_call",
+        name: "read",
+        toolCallId: "tool-1",
+        status: "completed",
+        text: "ok",
+      }),
+      TS,
+    );
+    expect(completed[1]).toEqual({
+      kind: "tool_result",
+      ts: TS,
+      toolUseId: "tool-1",
+      toolName: "read",
+      content: "ok",
+      isError: false,
+    });
+
+    const failed = parseAcpxStdoutLine(
+      emit({
+        type: "acpx.tool_call",
+        name: "edit",
+        toolCallId: "tool-2",
+        status: "failed",
+        text: "permission denied",
+      }),
+      TS,
+    );
+    expect(failed[1]).toMatchObject({ kind: "tool_result", isError: true, content: "permission denied" });
+  });
+
+  it("renders acpx.result with summary fallback to stopReason", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({ type: "acpx.result", summary: "completed", stopReason: "end_turn" }),
+      TS,
+    );
+    expect(entries[0]).toMatchObject({ kind: "result", text: "completed", subtype: "end_turn", isError: false });
+  });
+
+  it("treats acpx.error as a stderr entry", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({ type: "acpx.error", message: "auth required", code: "ACP_AUTH" }),
+      TS,
+    );
+    expect(entries).toEqual([{ kind: "stderr", ts: TS, text: "auth required" }]);
+  });
+
+  it("renders unknown acpx.* events as system entries", () => {
+    const entries = parseAcpxStdoutLine(
+      emit({ type: "acpx.misc", message: "unhandled" }),
+      TS,
+    );
+    expect(entries).toEqual([{ kind: "system", ts: TS, text: "unhandled" }]);
+  });
+
+  it("falls back to a stdout entry for non-JSON lines", () => {
+    const entries = parseAcpxStdoutLine("not json", TS);
+    expect(entries).toEqual([{ kind: "stdout", ts: TS, text: "not json" }]);
+  });
+});

packages/adapters/acpx-local/src/ui/parse-stdout.ts

@@ -0,0 +1,158 @@
+import type { TranscriptEntry } from "@paperclipai/adapter-utils";
+
+function parseJson(line: string): Record<string, unknown> | null {
+  try {
+    const parsed = JSON.parse(line);
+    if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed)) return null;
+    return parsed as Record<string, unknown>;
+  } catch {
+    return null;
+  }
+}
+
+function asString(value: unknown, fallback = ""): string {
+  return typeof value === "string" ? value : fallback;
+}
+
+function asNumber(value: unknown, fallback = 0): number {
+  return typeof value === "number" && Number.isFinite(value) ? value : fallback;
+}
+
+function stringify(value: unknown): string {
+  if (typeof value === "string") return value;
+  if (value === null || value === undefined) return "";
+  try {
+    return JSON.stringify(value, null, 2);
+  } catch {
+    return String(value);
+  }
+}
+
+function pickToolUseId(parsed: Record<string, unknown>): string {
+  return (
+    asString(parsed.toolCallId) ||
+    asString(parsed.toolUseId) ||
+    asString(parsed.id)
+  );
+}
+
+function statusText(parsed: Record<string, unknown>): string {
+  const text = asString(parsed.text).trim();
+  const tag = asString(parsed.tag).trim();
+  const used = asNumber(parsed.used, -1);
+  const size = asNumber(parsed.size, -1);
+  const parts: string[] = [];
+  if (text) parts.push(text);
+  if (tag && !text) parts.push(tag);
+  if (used >= 0 && size > 0) parts.push(`(${used}/${size} ctx)`);
+  return parts.join(" ") || tag || "status";
+}
+
+export function parseAcpxStdoutLine(line: string, ts: string): TranscriptEntry[] {
+  const parsed = parseJson(line);
+  if (!parsed) return [{ kind: "stdout", ts, text: line }];
+
+  const type = asString(parsed.type);
+  if (type === "acpx.session") {
+    const agent = asString(parsed.agent, "acpx");
+    const mode = asString(parsed.mode);
+    const permissionMode = asString(parsed.permissionMode);
+    const tail = [mode, permissionMode].filter(Boolean).join(" / ");
+    return [{
+      kind: "init",
+      ts,
+      model: tail ? `${agent} (${tail})` : agent,
+      sessionId:
+        asString(parsed.acpSessionId) ||
+        asString(parsed.sessionId) ||
+        asString(parsed.runtimeSessionName),
+    }];
+  }
+
+  if (type === "acpx.text_delta") {
+    const text = asString(parsed.text);
+    if (!text) return [];
+    const channel = asString(parsed.channel) || asString(parsed.stream);
+    return [{
+      kind: channel === "thought" || channel === "thinking" ? "thinking" : "assistant",
+      ts,
+      text,
+      delta: true,
+    }];
+  }
+
+  if (type === "acpx.tool_call") {
+    const status = asString(parsed.status);
+    const text = asString(parsed.text);
+    const name = asString(parsed.name, "acp_tool");
+    const toolUseId = pickToolUseId(parsed);
+    const input =
+      parsed.input !== undefined
+        ? parsed.input
+        : text || status
+          ? { ...(text ? { text } : {}), ...(status ? { status } : {}) }
+          : {};
+    const entries: TranscriptEntry[] = [
+      {
+        kind: "tool_call",
+        ts,
+        name,
+        toolUseId: toolUseId || undefined,
+        input,
+      },
+    ];
+    if (status === "completed" || status === "failed" || status === "cancelled") {
+      entries.push({
+        kind: "tool_result",
+        ts,
+        toolUseId: toolUseId || name,
+        toolName: name,
+        content: text || status,
+        isError: status !== "completed",
+      });
+    }
+    return entries;
+  }
+
+  if (type === "acpx.tool_result") {
+    return [{
+      kind: "tool_result",
+      ts,
+      toolUseId: pickToolUseId(parsed) || asString(parsed.name, "acp_tool"),
+      toolName: asString(parsed.name) || undefined,
+      content: stringify(parsed.content ?? parsed.output ?? parsed.error),
+      isError: parsed.isError === true || parsed.error !== undefined,
+    }];
+  }
+
+  if (type === "acpx.status") {
+    return [{ kind: "system", ts, text: statusText(parsed) }];
+  }
+
+  if (type === "acpx.result") {
+    return [{
+      kind: "result",
+      ts,
+      text: asString(parsed.summary, asString(parsed.stopReason, asString(parsed.text))),
+      inputTokens: asNumber(parsed.inputTokens),
+      outputTokens: asNumber(parsed.outputTokens),
+      cachedTokens: asNumber(parsed.cachedTokens),
+      costUsd: asNumber(parsed.costUsd),
+      subtype: asString(parsed.subtype, asString(parsed.stopReason, "acpx.result")),
+      isError: parsed.isError === true,
+      errors: Array.isArray(parsed.errors)
+        ? parsed.errors.map((error) => stringify(error)).filter(Boolean)
+        : [],
+    }];
+  }
+
+  if (type === "acpx.error") {
+    return [{ kind: "stderr", ts, text: asString(parsed.message, line) }];
+  }
+
+  if (type.startsWith("acpx.")) {
+    return [{ kind: "system", ts, text: asString(parsed.message, type) }];
+  }
+
+  return [{ kind: "stdout", ts, text: line }];
+}