diff --git a/lib/contributor.py b/lib/contributor.py
index e825384..fa86163 100644
--- a/lib/contributor.py
+++ b/lib/contributor.py
@@ -153,19 +153,22 @@ async def record_contributor_attribution(conn, pr_number: int, branch: str, git_
             agent_id = agent_id_match.group(1).strip() if agent_id_match else None
             upsert_contributor(conn, handle, agent_id, current_role, today)
 
-    # Fallback: if no attribution block found, try git commit author then branch agent
+    # Fallback: if no Pentagon-Agent trailer found, try git commit authors
+    _BOT_AUTHORS = frozenset({
+        "m3taversal", "teleo", "teleo-bot", "pipeline",
+        "github-actions[bot]", "forgejo-actions",
+    })
     if not agents_found:
-        # For external contributors: parse git commit author as attribution source
         rc_author, author_output = await git_fn(
-            "log", f"origin/main..origin/{branch}", "--format=%an", "-1",
-            timeout=10,
+            "log", f"origin/main..origin/{branch}", "--no-merges",
+            "--format=%an", timeout=10,
         )
         if rc_author == 0 and author_output.strip():
-            author_name = author_output.strip().lower()
-            # Skip generic/bot authors — fall through to branch agent
-            if author_name not in ("m3taversal", "teleo", "pipeline", ""):
-                upsert_contributor(conn, author_name, None, "extractor", today)
-                agents_found.add(author_name)
+            for author_line in author_output.strip().split("\n"):
+                author_name = author_line.strip().lower()
+                if author_name and author_name not in _BOT_AUTHORS:
+                    upsert_contributor(conn, author_name, None, "extractor", today)
+                    agents_found.add(author_name)
 
         if not agents_found:
             row = conn.execute("SELECT agent FROM prs WHERE number = ?", (pr_number,)).fetchone()
diff --git a/lib/eval_actions.py b/lib/eval_actions.py
index 30b816d..05cd609 100644
--- a/lib/eval_actions.py
+++ b/lib/eval_actions.py
@@ -18,6 +18,7 @@ from . import config, db
 from .eval_parse import classify_issues
 from .feedback import format_rejection_comment
 from .forgejo import api as forgejo_api, get_agent_token, repo_path
+from .github_feedback import on_closed, on_eval_complete
 from .pr_state import close_pr
 
 logger = logging.getLogger("pipeline.eval_actions")
@@ -81,6 +82,11 @@ async def terminate_pr(conn, pr_number: int, reason: str):
         logger.warning("PR #%d: Forgejo close failed — skipping source requeue, will retry next cycle", pr_number)
         return
 
+    try:
+        await on_closed(conn, pr_number, reason=reason)
+    except Exception:
+        logger.exception("PR #%d: GitHub close feedback failed (non-fatal)", pr_number)
+
     # Tag source for re-extraction with feedback
     cursor = conn.execute(
         """UPDATE sources SET status = 'needs_reextraction',
diff --git a/lib/evaluate.py b/lib/evaluate.py
index dc92fbb..0cf09fd 100644
--- a/lib/evaluate.py
+++ b/lib/evaluate.py
@@ -41,6 +41,7 @@ from .forgejo import get_agent_token, get_pr_diff, repo_path
 from .merge import PIPELINE_OWNED_PREFIXES
 from .llm import run_batch_domain_review, run_domain_review, run_leo_review, triage_pr
 from .eval_actions import dispose_rejected_pr, post_formal_approvals, terminate_pr
+from .github_feedback import on_eval_complete
 from .pr_state import approve_pr, close_pr, reopen_pr, start_review
 from .validate import load_existing_claims
 
@@ -267,6 +268,12 @@ async def evaluate_pr(conn, pr_number: int, tier: str = None) -> dict:
         # Disposition: check if this PR should be terminated or kept open
         await dispose_rejected_pr(conn, pr_number, eval_attempts, domain_issues)
 
+        try:
+            await on_eval_complete(conn, pr_number, outcome="rejected",
+                                   review_text=domain_review, issues=domain_issues)
+        except Exception:
+            logger.exception("PR #%d: GitHub eval feedback failed (non-fatal)", pr_number)
+
         if domain_verdict != "skipped":
             pr_cost += costs.record_usage(
                 conn, config.EVAL_DOMAIN_MODEL, "eval_domain",
@@ -358,6 +365,12 @@ async def evaluate_pr(conn, pr_number: int, tier: str = None) -> dict:
             logger.info("PR #%d: APPROVED + auto_merge (agent branch %s)", pr_number, branch_name)
         else:
             logger.info("PR #%d: APPROVED (tier=%s, leo=%s, domain=%s)", pr_number, tier, leo_verdict, domain_verdict)
+
+        try:
+            await on_eval_complete(conn, pr_number, outcome="approved",
+                                   review_text=leo_review or domain_review)
+        except Exception:
+            logger.exception("PR #%d: GitHub eval feedback failed (non-fatal)", pr_number)
     else:
         # Collect all issue tags from both reviews
         all_issues = []
@@ -398,6 +411,12 @@ async def evaluate_pr(conn, pr_number: int, tier: str = None) -> dict:
         # Disposition: check if this PR should be terminated or kept open
         await dispose_rejected_pr(conn, pr_number, eval_attempts, all_issues)
 
+        try:
+            await on_eval_complete(conn, pr_number, outcome="rejected",
+                                   review_text=leo_review or domain_review, issues=all_issues)
+        except Exception:
+            logger.exception("PR #%d: GitHub eval feedback failed (non-fatal)", pr_number)
+
     # Record cost (only for reviews that actually ran)
     if domain_verdict != "skipped":
         pr_cost += costs.record_usage(
diff --git a/lib/github_feedback.py b/lib/github_feedback.py
new file mode 100644
index 0000000..d729baf
--- /dev/null
+++ b/lib/github_feedback.py
@@ -0,0 +1,185 @@
+"""GitHub PR feedback — posts pipeline status to GitHub PRs for external contributors.
+
+Three touchpoints:
+1. Discovery ack: when pipeline discovers a mirrored PR
+2. Eval review: when evaluation completes (approved or rejected with reasoning)
+3. Merge/close outcome: when PR is merged or permanently closed
+
+Only fires for PRs with a github_pr link (set by sync-mirror.sh).
+All calls are non-fatal — GitHub feedback never blocks the pipeline.
+"""
+
+import logging
+import os
+
+import aiohttp
+
+from . import config
+
+logger = logging.getLogger("pipeline.github_feedback")
+
+GITHUB_API = "https://api.github.com"
+GITHUB_REPO = "living-ip/teleo-codex"
+
+_BOT_ACCOUNTS = frozenset({"m3taversal", "teleo-bot", "teleo", "github-actions[bot]"})
+
+
+def _github_pat() -> str | None:
+    pat_file = config.SECRETS_DIR / "github-pat"
+    if pat_file.exists():
+        return pat_file.read_text().strip()
+    return os.environ.get("GITHUB_PAT")
+
+
+async def _post_comment(github_pr: int, body: str) -> bool:
+    pat = _github_pat()
+    if not pat:
+        logger.warning("No GitHub PAT — skipping feedback for GH PR #%d", github_pr)
+        return False
+
+    url = f"{GITHUB_API}/repos/{GITHUB_REPO}/issues/{github_pr}/comments"
+    headers = {
+        "Authorization": f"Bearer {pat}",
+        "Accept": "application/vnd.github+json",
+        "X-GitHub-Api-Version": "2022-11-28",
+    }
+
+    try:
+        async with aiohttp.ClientSession() as session:
+            async with session.post(
+                url, headers=headers, json={"body": body},
+                timeout=aiohttp.ClientTimeout(total=30),
+            ) as resp:
+                if resp.status >= 400:
+                    text = await resp.text()
+                    logger.error("GitHub comment on PR #%d failed: %d %s", github_pr, resp.status, text[:200])
+                    return False
+                logger.info("GitHub comment posted on PR #%d", github_pr)
+                return True
+    except Exception:
+        logger.exception("GitHub comment on PR #%d failed", github_pr)
+        return False
+
+
+async def _close_github_pr(github_pr: int) -> bool:
+    pat = _github_pat()
+    if not pat:
+        return False
+
+    url = f"{GITHUB_API}/repos/{GITHUB_REPO}/pulls/{github_pr}"
+    headers = {
+        "Authorization": f"Bearer {pat}",
+        "Accept": "application/vnd.github+json",
+        "X-GitHub-Api-Version": "2022-11-28",
+    }
+
+    try:
+        async with aiohttp.ClientSession() as session:
+            async with session.patch(
+                url, headers=headers, json={"state": "closed"},
+                timeout=aiohttp.ClientTimeout(total=30),
+            ) as resp:
+                if resp.status >= 400:
+                    text = await resp.text()
+                    logger.error("GitHub close PR #%d failed: %d %s", github_pr, resp.status, text[:200])
+                    return False
+                logger.info("GitHub PR #%d closed", github_pr)
+                return True
+    except Exception:
+        logger.exception("GitHub close PR #%d failed", github_pr)
+        return False
+
+
+def _get_github_pr(conn, forgejo_pr: int) -> int | None:
+    row = conn.execute(
+        "SELECT github_pr FROM prs WHERE number = ? AND github_pr IS NOT NULL",
+        (forgejo_pr,),
+    ).fetchone()
+    return row["github_pr"] if row else None
+
+
+async def on_discovery(conn, forgejo_pr: int):
+    """Post discovery acknowledgment to GitHub PR."""
+    gh_pr = _get_github_pr(conn, forgejo_pr)
+    if not gh_pr:
+        return
+
+    body = (
+        "Your contribution has been received by the Teleo evaluation pipeline. "
+        "It's queued for automated review (priority: high).\n\n"
+        "You'll receive updates here as it progresses through evaluation.\n\n"
+        "_Automated message from the [LivingIP](https://livingip.xyz) pipeline._"
+    )
+    await _post_comment(gh_pr, body)
+
+
+async def on_eval_complete(conn, forgejo_pr: int, *, outcome: str, review_text: str = None, issues: list[str] = None):
+    """Post evaluation result to GitHub PR.
+
+    outcome: 'approved', 'rejected', 'changes_requested'
+    """
+    gh_pr = _get_github_pr(conn, forgejo_pr)
+    if not gh_pr:
+        return
+
+    if outcome == "approved":
+        body = "**Evaluation: Approved**\n\nYour contribution passed automated review and is queued for merge."
+        if review_text:
+            body += f"\n\n<details>\n<summary>Review details</summary>\n\n{review_text[:3000]}\n\n</details>"
+    elif outcome == "rejected":
+        body = "**Evaluation: Changes Requested**\n\n"
+        if issues:
+            body += "Issues found:\n"
+            for issue in issues:
+                body += f"- {issue}\n"
+        if review_text:
+            body += f"\n<details>\n<summary>Full review</summary>\n\n{review_text[:3000]}\n\n</details>"
+        body += (
+            "\n\nThe pipeline will attempt automated fixes where possible. "
+            "If fixes fail, the PR will be closed — you're welcome to resubmit."
+        )
+    else:
+        body = f"**Evaluation: {outcome}**\n\n"
+        if review_text:
+            body += review_text[:3000]
+
+    body += "\n\n_Automated message from the [LivingIP](https://livingip.xyz) pipeline._"
+    await _post_comment(gh_pr, body)
+
+
+async def on_merged(conn, forgejo_pr: int, *, claims_count: int = None):
+    """Post merge confirmation and close GitHub PR."""
+    gh_pr = _get_github_pr(conn, forgejo_pr)
+    if not gh_pr:
+        return
+
+    body = "**Merged!** Your contribution has been merged into the knowledge base."
+    if claims_count and claims_count > 0:
+        body += f" ({claims_count} claim{'s' if claims_count != 1 else ''} added)"
+    body += (
+        "\n\nThank you for contributing to LivingIP. "
+        "Your attribution has been recorded.\n\n"
+        "_Automated message from the [LivingIP](https://livingip.xyz) pipeline._"
+    )
+    await _post_comment(gh_pr, body)
+    await _close_github_pr(gh_pr)
+
+
+async def on_closed(conn, forgejo_pr: int, *, reason: str = None):
+    """Post closure notification and close GitHub PR."""
+    gh_pr = _get_github_pr(conn, forgejo_pr)
+    if not gh_pr:
+        return
+
+    body = "**Closed.** "
+    if reason:
+        body += reason
+    else:
+        body += "This PR was closed after evaluation."
+    body += (
+        "\n\nYou're welcome to resubmit with changes. "
+        "See the evaluation feedback above for guidance.\n\n"
+        "_Automated message from the [LivingIP](https://livingip.xyz) pipeline._"
+    )
+    await _post_comment(gh_pr, body)
+    await _close_github_pr(gh_pr)
diff --git a/lib/merge.py b/lib/merge.py
index 4612133..ed77924 100644
--- a/lib/merge.py
+++ b/lib/merge.py
@@ -46,6 +46,7 @@ for _prefix in PIPELINE_OWNED_PREFIXES:
 from .cascade import cascade_after_merge
 from .cross_domain import cross_domain_after_merge
 from .forgejo import get_agent_token, get_pr_diff, repo_path
+from .github_feedback import on_discovery, on_merged, on_closed
 
 logger = logging.getLogger("pipeline.merge")
 
@@ -146,6 +147,12 @@ async def discover_external_prs(conn) -> int:
                 if origin == "human":
                     await _post_ack_comment(pr["number"])
 
+                # GitHub PR feedback for mirrored PRs
+                try:
+                    await on_discovery(conn, pr["number"])
+                except Exception:
+                    logger.exception("PR #%d: GitHub discovery feedback failed (non-fatal)", pr["number"])
+
                 discovered += 1
 
         if len(prs) < 50:
@@ -860,6 +867,12 @@ async def _merge_domain_queue(conn, domain: str) -> tuple[int, int]:
             except Exception:
                 logger.exception("PR #%d: cross_domain failed (non-fatal)", pr_num)
 
+            # GitHub PR feedback: notify contributor of merge
+            try:
+                await on_merged(conn, pr_num)
+            except Exception:
+                logger.exception("PR #%d: GitHub merge feedback failed (non-fatal)", pr_num)
+
             conn.commit()  # Commit DB writes before slow branch deletion
 
             # Delete remote branch immediately (Ganymede Q4)