fix(activity-log): tool calls only — drop the agent's prose summary

The activity <details> was labelled 'tool calls & reasoning' but included the agent's final prose
summary ('Added the whoami service... Exposed via Traefik... Pushed to branch...'), which is just a
restatement of the PR description and not a tool call. Emit only tool_use events; relabel to
'N tool calls'. The what-changed narrative lives in the PR description; this section is the record of
actions taken.

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

.gitea/workflows/scripts/build-activity-log.sh

@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
-# Build activity log (tool calls + reasoning) from the event stream into /tmp/activity_log.md.
+# Build the activity log — the list of TOOL CALLS the agent made — into /tmp/activity_log.md.
-# Only dev agents (mode=pr) get an activity-log comment — comment-only roles (pm/qa)
+# Only dev agents (mode=pr) get an activity-log comment — comment-only roles (pm/qa) do no tool calls.
-# do no tool calls, so a trail would be empty/noise.
+# NOTE: we deliberately DO NOT include the agent's prose text parts. That final "here's what I did"
+# text is just a restatement of the PR description (already published as the PR body), not a tool
+# call — so it was noise in a section titled "tool calls". The log is the record of ACTIONS taken.
 #
 # Required env (provided by the workflow step): MODE
 set -u
@@ -11,22 +13,12 @@ if [ "$MODE" != "pr" ]; then
 fi
 jq -r '
   def trunc(n): if length > n then (.[0:n] + "…") else . end;
-  select(.type=="tool_use" or .type=="text") |
+  select(.type=="tool_use") |
-    if .type=="text" then
+    (.part.tool // "?") as $t |
-      # Drop the PR-description block from the reasoning trail — it is already published verbatim as
+    ((.part.state.title // (.part.state.input | tojson | trunc(160)) // "")) as $title |
-      # the PR description, so repeating it here is redundant noise. Skip a text part that is nothing
+    "🔧 **" + $t + "**: `" + ($title | trunc(240)) + "`"
-      # but that block (would otherwise be an empty "💬 " entry).
-      ((.part.text // "")
-       | gsub("BEGIN_PR_DESCRIPTION.*?END_PR_DESCRIPTION"; ""; "m")
-       | gsub("\\A[[:space:]]+|[[:space:]]+\\z"; "")) as $t |
-      if $t == "" then empty else "💬 " + ($t | trunc(4000)) end
-    else
-      (.part.tool // "?") as $t |
-      ((.part.state.title // (.part.state.input | tojson | trunc(160)) // "")) as $title |
-      "🔧 **" + $t + "**: `" + ($title | trunc(240)) + "`"
-    end
 ' /tmp/events.jsonl > /tmp/activity_log.md 2>/dev/null || true
 n=$(wc -l < /tmp/activity_log.md 2>/dev/null || echo 0)
-echo "activity log: $n entries"
+echo "activity log: $n tool calls"
 [ "$n" -eq 0 ] && : > /tmp/activity_log.md
 head -3 /tmp/activity_log.md

.gitea/workflows/scripts/publish.sh

@@ -144,7 +144,7 @@ activity=""
 if [ -s /tmp/activity_log.md ]; then
   entries=$(wc -l < /tmp/activity_log.md 2>/dev/null || echo 0)
   log=$(cat /tmp/activity_log.md)
-  activity=$(printf '\n\n<details>\n<summary>🔧 activity — %s tool calls & reasoning</summary>\n\n%s\n\n</details>' "$entries" "$log")
+  activity=$(printf '\n\n<details>\n<summary>🔧 activity — %s tool calls</summary>\n\n%s\n\n</details>' "$entries" "$log")
 fi
 
 # One PR per run: publish ONLY this run's own branch ($BRANCH), never sibling