feat(agents-config): add root AGENTS.md thin-pointer specification (#159)

Root AGENTS.md pointer file per the architecture decision in discussion #78: documents both config roots (.agents/skills/ portable portal skills, .claude/ orchestration) and the profile entry points, carries a framework_version marker registered in both version tools.

Design case made by @erikpr1994 in the #78 architecture thread; implementation by @jovin-nicholas.

AGENTS.md

@@ -0,0 +1,19 @@
+---
+framework_version: 1.0.0
+---
+
+# Agent Guidelines: AI Job Search
+
+This workspace is structured to manage job search activities, scraper tools, CVs, cover letters, and interview preparation.
+
+## Thin-Pointer Design (Single Source of Truth)
+
+To prevent duplication and configuration drift across different AI agent frameworks (Claude Code, Google Antigravity, Codex, Cursor, Gemini CLI, etc.), this workspace uses a unified thin-pointer design. All agent runtimes should load the canonical specifications and candidate profiles from the files and directories below:
+
+1. **Personal Candidate Profile:**
+   - The candidate profile, contact details, education, and target preferences are defined in [CLAUDE.md](CLAUDE.md) and the individual profile methodology files under [.claude/skills/job-application-assistant/](.claude/skills/job-application-assistant/) (specifically `01-*.md` etc.).
+2. **Canonical Workflow Specifications:**
+   - The step-by-step instructions and triggers for tasks (setup, scrape, rank, apply, upskill, interview) are defined in the [.claude/](.claude/) directory (specifically under `.claude/skills/` and `.claude/commands/`).
+   - Do not duplicate these rules or specifications. Treat `.claude/` files as the single source of truth.
+3. **Portal Search Skills:**
+   - Job-portal search CLIs live under [.agents/skills/](.agents/skills/) in the portable Agent Skills format (with a `SKILL.md` per portal). Codex and Antigravity discover these automatically; the `/scrape` workflow in [.claude/skills/job-scraper/](.claude/skills/job-scraper/) orchestrates them.

tools/check_framework_version.py

@@ -17,6 +17,11 @@ ROOT = Path(__file__).resolve().parent.parent
 SKILL_DIR = ROOT / ".claude/skills/job-application-assistant"
 FRAMEWORK_FILES = sorted(SKILL_DIR.glob("*.md"))
 
+# Add root AGENTS.md if it exists
+root_agents = ROOT / "AGENTS.md"
+if root_agents.exists():
+    FRAMEWORK_FILES.append(root_agents)
+
 def run_git(args: list[str]) -> tuple[int, str, str]:
     res = subprocess.run(["git"] + args, cwd=str(ROOT), capture_output=True, text=True)
     return res.returncode, res.stdout, res.stderr

tools/check_upstream_updates.py

@@ -20,16 +20,16 @@ import sys
 from pathlib import Path
 
 ROOT = Path(__file__).resolve().parent.parent
-SKILL_DIR = ".claude/skills/job-application-assistant"
 FRAMEWORK_FILES = [
-    "01-candidate-profile.md",
-    "02-behavioral-profile.md",
-    "03-writing-style.md",
-    "04-job-evaluation.md",
-    "05-cv-templates.md",
-    "06-cover-letter-templates.md",
-    "07-interview-prep.md",
-    "SKILL.md",
+    ".claude/skills/job-application-assistant/01-candidate-profile.md",
+    ".claude/skills/job-application-assistant/02-behavioral-profile.md",
+    ".claude/skills/job-application-assistant/03-writing-style.md",
+    ".claude/skills/job-application-assistant/04-job-evaluation.md",
+    ".claude/skills/job-application-assistant/05-cv-templates.md",
+    ".claude/skills/job-application-assistant/06-cover-letter-templates.md",
+    ".claude/skills/job-application-assistant/07-interview-prep.md",
+    ".claude/skills/job-application-assistant/SKILL.md",
+    "AGENTS.md",
 ]
 
 def run_git(args: list[str]) -> tuple[int, str, str]:
@@ -94,10 +94,10 @@ def main() -> int:
     updates_available = []
     errors = []
 
-    for filename in FRAMEWORK_FILES:
-        local_path = ROOT / SKILL_DIR / filename
+    for rel_path in FRAMEWORK_FILES:
+        local_path = ROOT / rel_path
         if not local_path.exists():
-            print(f"Local file missing: {SKILL_DIR}/{filename}")
+            print(f"Local file missing: {rel_path}")
             continue
 
         # Get local version
@@ -105,7 +105,7 @@ def main() -> int:
         local_ver = get_framework_version_from_text(local_text)
         
         # Get upstream version
-        rc, upstream_text, _ = run_git(["show", f"{ref}:{SKILL_DIR}/{filename}"])
+        rc, upstream_text, _ = run_git(["show", f"{ref}:{rel_path}"])
         if rc != 0:
             # File might not exist upstream yet
             continue
@@ -113,19 +113,20 @@ def main() -> int:
         upstream_ver = get_framework_version_from_text(upstream_text)
         
         if not local_ver:
-            errors.append(f"Local file {filename} is missing 'framework_version' in frontmatter.")
+            errors.append(f"Local file {rel_path} is missing 'framework_version' in frontmatter.")
             continue
         if not upstream_ver:
             continue
             
         if parse_semver(upstream_ver) > parse_semver(local_ver):
             updates_available.append({
-                "filename": filename,
+                "filename": Path(rel_path).name,
                 "local": local_ver,
                 "upstream": upstream_ver,
-                "path": f"{SKILL_DIR}/{filename}"
+                "path": rel_path
             })
 
+
     if errors:
         print("Configuration errors:")
         for err in errors: