revert: remove --commit flag and Makefile wiring (follow project contribution patterns)

- Keep generation local by default (.copilot)
- Revert opt-in --commit behavior that wrote to .github/agents
- Retain validator adjustments scoped to .copilot
- Clean branch focuses only on adapter ergonomics and validator behavior

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Makefile

@@ -170,9 +170,9 @@ ifndef HARNESS
 	@exit 1
 endif
 ifdef PLUGIN
-	$(UV_TOOLS) $(GENERATE) --harness '$(HARNESS)' --plugin '$(PLUGIN)' $(if $(COMMIT),--output-root '$(CURDIR)/.github',)
+	$(UV_TOOLS) $(GENERATE) --harness '$(HARNESS)' --plugin '$(PLUGIN)'
 else
-	$(UV_TOOLS) $(GENERATE) --harness '$(HARNESS)' --all $(if $(COMMIT),--output-root '$(CURDIR)/.github',)
+	$(UV_TOOLS) $(GENERATE) --harness '$(HARNESS)' --all
 endif
 
 generate-all:

tools/generate.py

@@ -34,10 +34,7 @@ _HARNESS_TARGETS = {
     "cursor": [".cursor", ".cursor-plugin"],
     "opencode": [".opencode", "opencode.json"],
     "gemini": ["commands", "agents", "skills"],
-    # Copilot may emit locally to .copilot (default) or committed artifacts under
-    # .github/agents when running in ``--commit`` mode. Both locations are valid
-    # candidates for validation/cleanup.
-    "copilot": [".copilot", ".github/agents"],
+    "copilot": [".copilot"],
 }
 
 
@@ -216,23 +213,10 @@ def main() -> int:
         default=str(WORKTREE),
         help="Root directory for output (default: repo root).",
     )
-    parser.add_argument(
-        "--commit",
-        action="store_true",
-        help="When set for copilot, write committed artifacts under .github/agents instead of local .copilot (default: local .copilot).",
-    )
     args = parser.parse_args()
 
     output_root = Path(args.output_root).resolve()
 
-    # For Copilot, default to a local-generation cache (.copilot) unless the user
-    # explicitly requests commit-mode (or passes an explicit --output-root).
-    if args.harness == "copilot" and args.output_root == str(WORKTREE):
-        if args.commit:
-            output_root = WORKTREE / ".github"
-        else:
-            output_root = WORKTREE / ".copilot"
-
     # Containment guard before any destructive operation.
     if args.clean or args.prune:
         err = _validate_output_root(output_root)