fix: backfill agent-context extension for integrations

src/specify_cli/integrations/_helpers.py

@@ -144,6 +144,42 @@ def _remove_integration_json(project_root: Path) -> None:
         path.unlink()
 
 
+def _ensure_agent_context_extension(project_root: Path) -> None:
+    """Install the bundled agent-context extension if its config will be used."""
+    from .. import (
+        _AGENT_CTX_EXT_CONFIG,
+        _load_agent_context_config,
+        _save_agent_context_config,
+    )
+    from .._assets import _locate_bundled_extension
+    from ..extensions import ExtensionManager
+
+    ext_mgr = ExtensionManager(project_root)
+    ext_dir = project_root / ".specify" / "extensions" / "agent-context"
+    if (
+        ext_mgr.registry.is_installed("agent-context") and
+        (ext_dir / "extension.yml").is_file()
+    ):
+        return
+
+    existing_cfg = None
+    if (project_root / _AGENT_CTX_EXT_CONFIG).exists():
+        existing_cfg = _load_agent_context_config(project_root)
+
+    bundled_ac = _locate_bundled_extension("agent-context")
+    if bundled_ac is None:
+        raise ValueError("bundled agent-context extension not found")
+
+    ext_mgr.install_from_directory(
+        bundled_ac,
+        _get_speckit_version(),
+        force=ext_mgr.registry.is_installed("agent-context"),
+    )
+
+    if existing_cfg is not None:
+        _save_agent_context_config(project_root, existing_cfg)
+
+
 # ---------------------------------------------------------------------------
 # Error sentinels
 # ---------------------------------------------------------------------------
@@ -308,20 +344,15 @@ def _update_init_options_for_integration(
     # Update the agent-context extension config BEFORE init-options.json
     # so a failure here doesn't leave init-options partially updated.
     ext_cfg_path = project_root / _AGENT_CTX_EXT_CONFIG
+    if integration.context_file:
+        _ensure_agent_context_extension(project_root)
+
     if ext_cfg_path.exists():
         _update_agent_context_config_file(
             project_root,
             integration.context_file,
             preserve_markers=True,
         )
-    elif integration.context_file:
-        # Extension config doesn't exist yet (extension not installed).
-        # Write defaults so scripts have something to read.
-        _update_agent_context_config_file(
-            project_root,
-            integration.context_file,
-            preserve_markers=False,
-        )
 
     save_init_options(project_root, opts)
 

tests/integrations/test_integration_subcommand.py

@@ -2,6 +2,7 @@
 
 import json
 import os
+import shutil
 
 from typer.testing import CliRunner
 
@@ -48,6 +49,34 @@ def _write_invalid_manifest(project, key):
     return manifest
 
 
+def _remove_agent_context_extension(project):
+    ext_dir = project / ".specify" / "extensions" / "agent-context"
+    if ext_dir.exists():
+        shutil.rmtree(ext_dir)
+
+    registry = project / ".specify" / "extensions" / ".registry"
+    if registry.exists():
+        data = json.loads(registry.read_text(encoding="utf-8"))
+        data.get("extensions", {}).pop("agent-context", None)
+        registry.write_text(json.dumps(data), encoding="utf-8")
+
+
+def _assert_agent_context_installed(project, context_file):
+    ext_dir = project / ".specify" / "extensions" / "agent-context"
+    assert (ext_dir / "extension.yml").is_file()
+    assert (ext_dir / "commands" / "speckit.agent-context.update.md").is_file()
+    assert (ext_dir / "scripts" / "bash" / "update-agent-context.sh").is_file()
+
+    registry = project / ".specify" / "extensions" / ".registry"
+    data = json.loads(registry.read_text(encoding="utf-8"))
+    assert "agent-context" in data["extensions"]
+
+    from specify_cli import _load_agent_context_config
+
+    cfg = _load_agent_context_config(project)
+    assert cfg["context_file"] == context_file
+
+
 def _integration_list_row_cells(output: str, key: str) -> list[str]:
     plain = strip_ansi(output)
     row = next(line for line in plain.splitlines() if line.startswith(f"│ {key}"))
@@ -191,6 +220,21 @@ def test_install_already_installed_non_default_guides_use(self, tmp_path):
         assert "specify integration upgrade codex" in normalized
         assert "specify integration uninstall codex" not in normalized
 
+    def test_install_backfills_agent_context_extension_when_missing(self, tmp_path):
+        project = _init_project(tmp_path, "copilot")
+        _remove_agent_context_extension(project)
+        (project / ".specify" / "integration.json").unlink()
+        (project / ".specify" / "integrations" / "copilot.manifest.json").unlink()
+        shutil.rmtree(project / ".github")
+
+        result = _run_in_project(project, [
+            "integration", "install", "copilot",
+            "--script", "sh",
+        ])
+
+        assert result.exit_code == 0, result.output
+        _assert_agent_context_installed(project, ".github/copilot-instructions.md")
+
     def test_install_different_when_one_exists(self, tmp_path):
         project = _init_project(tmp_path, "copilot")
         old_cwd = os.getcwd()
@@ -1155,6 +1199,18 @@ def test_switch_from_nothing(self, tmp_path):
         data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
         assert data["integration"] == "claude"
 
+    def test_switch_backfills_agent_context_extension_when_missing(self, tmp_path):
+        project = _init_project(tmp_path, "claude")
+        _remove_agent_context_extension(project)
+
+        result = _run_in_project(project, [
+            "integration", "switch", "copilot",
+            "--script", "sh",
+        ])
+
+        assert result.exit_code == 0, result.output
+        _assert_agent_context_installed(project, ".github/copilot-instructions.md")
+
     def test_failed_switch_keeps_fallback_metadata_consistent(self, tmp_path):
         project = _init_project(tmp_path, "claude")
         old_cwd = os.getcwd()
@@ -1308,6 +1364,19 @@ def test_upgrade_default_refreshes_shared_script_refs_for_option_separator_chang
         assert "/speckit.specify" not in managed_content
         assert customized_script.read_text(encoding="utf-8") == customized_before
 
+    def test_upgrade_backfills_agent_context_extension_when_missing(self, tmp_path):
+        project = _init_project(tmp_path, "copilot")
+        _remove_agent_context_extension(project)
+
+        result = _run_in_project(project, [
+            "integration", "upgrade", "copilot",
+            "--script", "sh",
+            "--force",
+        ])
+
+        assert result.exit_code == 0, result.output
+        _assert_agent_context_installed(project, ".github/copilot-instructions.md")
+
     def test_upgrade_non_default_keeps_default_template_invocations(self, tmp_path):
         project = _init_project(tmp_path, "gemini")
         template = project / ".specify" / "templates" / "plan-template.md"