fix: generate browser challenge workspace config

examples/agent_challenges/browser_click_challenge/README.md

@@ -19,10 +19,11 @@ uv run wf --config examples/agent_challenges/browser_click_challenge/workspaces/
 ```
 
 For each local-mode trial, the harness copies `workspace_template/` into
-`workspaces/<model>-trial-<n>/` and injects that config path into the prompt.
+`workspaces/<model>-trial-<n>/`, generates a config whose Python source path is
-This builds the configured workflow server in the CLI process for each command
+relative to that copied config, and injects the config path into the prompt. This
-and uses the copied workspace's durable store. It does not reuse in-memory
+builds the configured workflow server in the CLI process for each command and
-source sessions across CLI invocations.
+uses the copied workspace's durable store. It does not reuse in-memory source
+sessions across CLI invocations.
 
 Use `--start-server` when the trial should exercise the JSON-RPC server path.
 With `--start-server`, the harness starts:
@@ -60,10 +61,10 @@ For manual authoring trials, use:
 examples/agent_challenges/browser_click_challenge/workspace_template/
 ```
 
-It contains a local workflow config and prompt template that point at the
+It contains the prompt template and local store ignore rules without exposing a
-browser-click Python source without exposing a generated draft patch answer
+generated draft patch answer file. The harness copies it automatically for
-file. The harness copies it automatically for normal local-mode trials. For
+normal local-mode trials and writes `wf.config.json` into the copied workspace.
-manual experiments, copy it under:
+For manual experiments, copy it under:
 
 ```text
 examples/agent_challenges/browser_click_challenge/workspaces/

examples/agent_challenges/browser_click_challenge/run_opencode_trials.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import argparse
 import json
+import os
 import shutil
 import subprocess
 import sys
@@ -30,6 +31,7 @@ DEFAULT_WORKSPACES_DIR = CHALLENGE_DIR / "workspaces"
 DEFAULT_WORKSPACE_TEMPLATE = CHALLENGE_DIR / "workspace_template"
 DEFAULT_SERVER_PORT = 8772
 EXAMPLE_CONFIG = ROOT / "examples" / "browser_click_workflow" / "wf.config.json"
+EXAMPLE_SOURCE_ROOT = ROOT / "examples" / "browser_click_workflow"
 EXAMPLE_CONFIG_ARG = "examples/browser_click_workflow/wf.config.json"
 LOCAL_WF_COMMAND_PREFIX = f"uv run wf --config {EXAMPLE_CONFIG_ARG} --local"
 
@@ -127,6 +129,7 @@ def prepare_trial_workspace(
     index: int,
     workspaces_dir: Path = DEFAULT_WORKSPACES_DIR,
     template_dir: Path = DEFAULT_WORKSPACE_TEMPLATE,
+    source_root: Path = EXAMPLE_SOURCE_ROOT,
 ) -> TrialWorkspace:
     """Copy the authoring template into a clean ignored per-trial directory."""
     root = workspaces_dir / f"{_safe_model_name(model)}-trial-{index:03d}"
@@ -135,11 +138,38 @@ def prepare_trial_workspace(
         # the ignored per-trial directory before copying the template.
         shutil.rmtree(root)
     shutil.copytree(template_dir, root)
-    return TrialWorkspace(
+    workspace = TrialWorkspace(
         root=root,
         config_path=root / "wf.config.json",
         prompt_path=root / "prompt.md",
     )
+    write_trial_config(workspace.config_path, source_root=source_root)
+    return workspace
+
+
+def write_trial_config(config_path: Path, *, source_root: Path) -> None:
+    """Write a per-trial config with Python source path relative to config."""
+    relative_source = Path(os.path.relpath(source_root, config_path.parent)).as_posix()
+    config = {
+        "version": 1,
+        "client": {"target": {"kind": "local"}},
+        "server": {
+            "store": {"kind": "filesystem", "root": ".wf_browser_click_store"},
+            "sources": [
+                {
+                    "kind": "python",
+                    "id": "local.browser_click",
+                    "path": relative_source,
+                    "module": "ops",
+                    "registry": "registry",
+                }
+            ],
+        },
+    }
+    config_path.write_text(
+        json.dumps(config, indent=2, sort_keys=True) + "\n",
+        encoding="utf-8",
+    )
 
 
 def wf_command_prefix_for_config(config_path: Path) -> str:

examples/agent_challenges/browser_click_challenge/workspace_template/wf.config.json

@@ -1,23 +0,0 @@
-{
-  "version": 1,
-  "client": {
-    "target": {
-      "kind": "local"
-    }
-  },
-  "server": {
-    "store": {
-      "kind": "filesystem",
-      "root": ".wf_browser_click_store"
-    },
-    "sources": [
-      {
-        "kind": "python",
-        "id": "local.browser_click",
-        "path": "../../../../browser_click_workflow",
-        "module": "ops",
-        "registry": "registry"
-      }
-    ]
-  }
-}

tests/examples/test_opencode_browser_click_challenge.py

@@ -254,20 +254,34 @@ def test_prepare_trial_workspace_copies_template_to_model_trial_dir(
 ) -> None:
     template = tmp_path / "template"
     template.mkdir()
-    (template / "wf.config.json").write_text('{"version": 1}', encoding="utf-8")
     (template / "prompt.md").write_text("prompt", encoding="utf-8")
     (template / ".gitignore").write_text(".wf_store/\n", encoding="utf-8")
     workspaces = tmp_path / "workspaces"
+    source_root = tmp_path / "browser_click_workflow"
+    source_root.mkdir()
 
     prepared = prepare_trial_workspace(
         model="opencode/mimo-v2.5-free",
         index=7,
         workspaces_dir=workspaces,
         template_dir=template,
+        source_root=source_root,
     )
 
     assert prepared.root == workspaces / "opencode_mimo-v2.5-free-trial-007"
-    assert prepared.config_path.read_text(encoding="utf-8") == '{"version": 1}'
+    config = json.loads(prepared.config_path.read_text(encoding="utf-8"))
+    assert config["client"]["target"] == {"kind": "local"}
+    assert config["server"]["store"] == {
+        "kind": "filesystem",
+        "root": ".wf_browser_click_store",
+    }
+    assert config["server"]["sources"][0] == {
+        "kind": "python",
+        "id": "local.browser_click",
+        "path": "../../browser_click_workflow",
+        "module": "ops",
+        "registry": "registry",
+    }
     assert prepared.prompt_path.read_text(encoding="utf-8") == "prompt"
     assert (prepared.root / ".gitignore").read_text(encoding="utf-8") == ".wf_store/\n"
 
@@ -277,8 +291,9 @@ def test_prepare_trial_workspace_removes_stale_previous_attempt(
 ) -> None:
     template = tmp_path / "template"
     template.mkdir()
-    (template / "wf.config.json").write_text('{"version": 1}', encoding="utf-8")
     (template / "prompt.md").write_text("prompt", encoding="utf-8")
+    source_root = tmp_path / "browser_click_workflow"
+    source_root.mkdir()
     workspaces = tmp_path / "workspaces"
     stale = workspaces / "opencode_mimo-v2.5-free-trial-001" / "old-answer.json"
     stale.parent.mkdir(parents=True)
@@ -289,6 +304,7 @@ def test_prepare_trial_workspace_removes_stale_previous_attempt(
         index=1,
         workspaces_dir=workspaces,
         template_dir=template,
+        source_root=source_root,
     )
 
     assert prepared.root.exists()