fix(agent): route issue-opened events (event_name is workflow_call in reusable wf)

The shared agent.yml is a reusable (workflow_call) workflow, so on Gitea
github.event_name evaluates to 'workflow_call' — not the original 'issues'/
'issue_comment'. route.sh branched on EVENT == "issues", so issue-opened runs
scanned the empty comment body and skipped the @pm fallback, exiting 1 with
"no known agent mentioned" (runs #393/#394). Comment runs were unaffected
because the @mention lives in $BODY.

Discriminate on the comment id (CID) instead, which IS reliably forwarded in
the event payload: empty => issue-opened (scan issue body, default @pm), set
=> comment (scan comment body). Also add .gitignore for .env.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/agent.yml

@@ -56,7 +56,11 @@ jobs:
           SCRIPTS: ${{ github.workspace }}/.agents-workflow/.gitea/workflows/scripts
           BODY: ${{ github.event.comment.body }}      # event text via env, never inline in shell
           IBODY: ${{ github.event.issue.body }}
-          EVENT: ${{ github.event_name }}
+          # Comment-vs-issue discriminator. Do NOT use github.event_name here: this is a REUSABLE
+          # (workflow_call) workflow, so on Gitea event_name is 'workflow_call', not the original
+          # 'issues'/'issue_comment'. The comment id, however, is reliably present in the forwarded
+          # payload — empty on an issue-opened event, set on a comment event.
+          CID: ${{ github.event.comment.id }}
           IS_PR: ${{ github.event.issue.pull_request }}
           NUM: ${{ github.event.issue.number }}
           GT: ${{ secrets.GITEA_TOKEN }}

.gitea/workflows/scripts/route.sh

@@ -4,7 +4,7 @@
 # /tmp/agents.json, picks which agent to run, emits step outputs (name/model/vision/mode/branch/new)
 # to $GITHUB_OUTPUT, configures git identity, and prepares/publishes the working branch.
 #
-# Required env (all provided by the workflow step): BODY IBODY EVENT IS_PR NUM GT
+# Required env (all provided by the workflow step): BODY IBODY CID IS_PR NUM GT
 #   TOKEN_PM TOKEN_SENIOR TOKEN_JUNIOR TOKEN_LEAD TOKEN_QA
 #   GITHUB_SERVER_URL GITHUB_REPOSITORY GITHUB_OUTPUT
 set -eu
@@ -26,13 +26,15 @@ cat > /tmp/agents.json <<'JSON'
 }
 JSON
 # On a new issue, @pm auto-assesses. On a comment, route by the @mention.
-scan="$BODY"; [ "$EVENT" = "issues" ] && scan="$IBODY"
+# A comment event has a comment id (CID); an issue-opened event does not. (event_name is unreliable
+# here — see agent.yml: this reusable workflow sees it as 'workflow_call'.)
+if [ -n "$CID" ]; then scan="$BODY"; else scan="$IBODY"; fi
 name=""
 for a in pm junior senior lead qa; do
   case "$scan" in *"@$a"*) name=$a; break;; esac
 done
 if [ -z "$name" ]; then
-  if [ "$EVENT" = "issues" ]; then name=pm; else echo "no known agent mentioned"; exit 1; fi
+  if [ -z "$CID" ]; then name=pm; else echo "no known agent mentioned"; exit 1; fi
 fi
 model=$(jq -r --arg a "$name" '.[$a].model'  /tmp/agents.json)
 vision=$(jq -r --arg a "$name" '.[$a].vision' /tmp/agents.json)

.gitignore

@@ -0,0 +1 @@
+.env