Merge branch 'main' into posthog-code/fix-worktree-claude-linking

Author: richardsolomou

.github/workflows/build.yml

@@ -77,6 +77,9 @@ jobs:
       - name: Build enricher
         run: pnpm --filter @posthog/enricher build
 
+      - name: Build harness
+        run: pnpm --filter @posthog/harness build
+
       - name: Build agent
         run: pnpm --filter agent build
 

.github/workflows/code-build-test.yml

@@ -88,6 +88,7 @@ jobs:
           pnpm --filter @posthog/shared run build
           pnpm --filter @posthog/git run build
           pnpm --filter @posthog/enricher run build
+          pnpm --filter @posthog/harness run build
           pnpm --filter @posthog/agent run build
 
       # build/Assets.car is gitignored; regenerate it so the packaged app ships
@@ -205,6 +206,7 @@ jobs:
           pnpm --filter @posthog/shared run build
           pnpm --filter @posthog/git run build
           pnpm --filter @posthog/enricher run build
+          pnpm --filter @posthog/harness run build
           pnpm --filter @posthog/agent run build
 
       - name: Build app
@@ -275,6 +277,7 @@ jobs:
           pnpm --filter @posthog/shared run build
           pnpm --filter @posthog/git run build
           pnpm --filter @posthog/enricher run build
+          pnpm --filter @posthog/harness run build
           pnpm --filter @posthog/agent run build
 
       - name: Build app

.github/workflows/code-release.yml

@@ -140,6 +140,9 @@ jobs:
       - name: Build enricher package
         run: pnpm --filter @posthog/enricher run build
 
+      - name: Build harness package
+        run: pnpm --filter @posthog/harness run build
+
       - name: Build agent package
         run: pnpm --filter @posthog/agent run build
 
@@ -331,6 +334,9 @@ jobs:
       - name: Build enricher package
         run: pnpm --filter @posthog/enricher run build
 
+      - name: Build harness package
+        run: pnpm --filter @posthog/harness run build
+
       - name: Build agent package
         run: pnpm --filter @posthog/agent run build
 
@@ -457,6 +463,9 @@ jobs:
       - name: Build enricher package
         run: pnpm --filter @posthog/enricher run build
 
+      - name: Build harness package
+        run: pnpm --filter @posthog/harness run build
+
       - name: Build agent package
         run: pnpm --filter @posthog/agent run build
 

.github/workflows/code-storybook.yml

@@ -149,16 +149,20 @@ jobs:
           pid2=$!
           wait_all "$pid1" "$pid2"
 
-          # @posthog/agent imports @posthog/git's dist, so git must finish
-          # before the last group starts.
-          pnpm --filter @posthog/git build
-
-          pnpm --filter @posthog/enricher build &
+          # @posthog/agent imports the dist of @posthog/git and
+          # @posthog/harness, so both must finish before the last group starts.
+          pnpm --filter @posthog/git build &
           pid3=$!
-          pnpm --filter @posthog/agent build &
+          pnpm --filter @posthog/harness build &
           pid4=$!
           wait_all "$pid3" "$pid4"
 
+          pnpm --filter @posthog/enricher build &
+          pid5=$!
+          pnpm --filter @posthog/agent build &
+          pid6=$!
+          wait_all "$pid5" "$pid6"
+
       - name: Build Storybook
         working-directory: apps/code
         run: pnpm build-storybook

.github/workflows/code-update-e2e.yml

@@ -106,6 +106,7 @@ jobs:
           pnpm --filter @posthog/shared run build
           pnpm --filter @posthog/git run build
           pnpm --filter @posthog/enricher run build
+          pnpm --filter @posthog/harness run build
           pnpm --filter @posthog/agent run build
 
       - name: Build old + new update pair

.github/workflows/pr-build-installer.yml

@@ -93,6 +93,7 @@ jobs:
           pnpm --filter @posthog/shared run build
           pnpm --filter @posthog/git run build
           pnpm --filter @posthog/enricher run build
+          pnpm --filter @posthog/harness run build
           pnpm --filter @posthog/agent run build
 
       # build/Assets.car is gitignored; regenerate it so the packaged app ships

.github/workflows/test.yml

@@ -140,8 +140,9 @@ jobs:
           pnpm --filter @posthog/shared build
           pnpm --filter @posthog/git build
           pnpm --filter @posthog/enricher build
-          pnpm --filter agent build &
           wait
+          pnpm --filter @posthog/harness build
+          pnpm --filter agent build
 
       - name: Package Electron app
         run: pnpm --filter code run package

packages/agent/package.json

@@ -84,6 +84,10 @@
       "types": "./dist/handoff-checkpoint.d.ts",
       "import": "./dist/handoff-checkpoint.js"
     },
+    "./pi": {
+      "types": "./dist/pi/rpc-client.d.ts",
+      "import": "./dist/pi/rpc-client.js"
+    },
     "./server": {
       "types": "./dist/server/agent-server.d.ts",
       "import": "./dist/server/agent-server.js"
@@ -136,13 +140,15 @@
     "@agentclientprotocol/sdk": "1.1.0",
     "@anthropic-ai/claude-agent-sdk": "0.3.197",
     "@anthropic-ai/sdk": "0.109.0",
+    "@earendil-works/pi-coding-agent": "catalog:",
     "@hono/node-server": "^1.19.9",
     "@openai/codex": "0.140.0",
     "@opentelemetry/api-logs": "^0.208.0",
     "@opentelemetry/exporter-logs-otlp-http": "^0.208.0",
     "@opentelemetry/resources": "^2.0.0",
     "@opentelemetry/sdk-logs": "^0.208.0",
     "@opentelemetry/semantic-conventions": "^1.28.0",
+    "@posthog/harness": "workspace:*",
     "@types/jsonwebtoken": "^9.0.10",
     "commander": "^14.0.2",
     "fflate": "^0.8.2",

packages/agent/src/adapters/base-acp-agent.ts

@@ -18,11 +18,11 @@ import type {
 } from "@agentclientprotocol/sdk";
 import { restrictedModelMeta } from "@posthog/shared";
 import {
+  compareModelsForPicker,
   DEFAULT_GATEWAY_MODEL,
   fetchGatewayModels,
   formatGatewayModelName,
   type GatewayModel,
-  getClaudeModelRecency,
   isAnthropicModel,
   isCloudflareModel,
   isCloudflareModelId,
@@ -163,12 +163,7 @@ export abstract class BaseAcpAgent implements Agent {
         // silently dropping them.
         ...(model.allowed ? {} : { _meta: restrictedModelMeta() }),
       }))
-      // Sort oldest-to-newest so the picker is deterministic and the newest
-      // model lands at the end of the list, closest to the trigger.
-      .sort(
-        (a, b) =>
-          getClaudeModelRecency(a.value) - getClaudeModelRecency(b.value),
-      );
+      .sort((a, b) => compareModelsForPicker(a.value, b.value));
 
     // Models the Claude adapter can drive: Anthropic ids, plus Cloudflare `@cf/` ids the gateway
     // serves over its Anthropic-Messages surface. Anything else (e.g. a Codex/GPT id) is a genuine

packages/agent/src/adapters/claude/session/model-config.test.ts

@@ -19,6 +19,18 @@ describe("applyAvailableModelsAllowlist", () => {
     ).toEqual(rawModelOptions);
   });
 
+  it("reorders the allowlist to the picker order instead of the listed order", () => {
+    expect(
+      applyAvailableModelsAllowlist(rawModelOptions, [
+        "claude-sonnet-4-6",
+        "claude-opus-4-8",
+      ]).options,
+    ).toEqual([
+      { value: "claude-opus-4-8", name: "Claude Opus 4.8" },
+      { value: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
+    ]);
+  });
+
   it("switches the current model when the previous one is filtered out", () => {
     expect(
       applyAvailableModelsAllowlist(rawModelOptions, ["claude-sonnet-4-6"]),