Immutable. This exact content is served forever at /api/v1/blob/bdba4b613c7a867a.
---
name: profile
description: "Session clock-time AND token/cost analyzer. Reads the foundry plugin's timings.jsonl and invocations.jsonl logs (written by task-log.js) for wall-time, plus Claude Code transcripts (~/.claude/projects/**, main-loop + subagent files) for token usage and USD cost, and merges both into one per-session and per-skill report — local-tool vs subagent-spawn vs Skill vs AskUserQuestion idle vs main-loop reasoning residual time, and main-loop vs subagent spend by model tier. Useful for answering \"why did /oss:resolve run 30 minutes?\", \"what did this session cost?\", or \"which skill burns the most tokens?\". Pure log/transcript read — no instrumentation, no skill edits, no LLM calls. TRIGGER when: user asks where wall-clock time OR tokens/cost go during a skill/session, why a skill is slow or expensive, what dominates total runtime or spend, or wants a per-skill rollup over a recent window; phrases: \"where does time go\", \"why so slow\", \"what did this cost\", \"token spend\", \"why so expensive\", \"profile last session\", \"clock breakdown\", \"session timing\", \"which skill burns tokens\". SKIP: per-line Python perf (use foundry:perf-optimizer); known failure or hang (use /foundry:investigate); a real billing statement (prices are public list rates, not effective plan rates)."
argument-hint: '[--since 24h|7d|30d] [--session-id ID] [--top-n N]'
allowed-tools: Read, Write, Bash, TaskCreate, TaskUpdate, AskUserQuestion
model: sonnet
effort: low
---
<objective>
Bucket session **clock time** from `~/.claude/logs/{timings,invocations}.jsonl` into:
1. **Local tools** — Bash/Read/Edit/Write/Grep/Glob and other main-process tools
2. **Agent / subagent spawns** — Task/Agent calls (sync + background)
3. **Skill** — `tool=Skill` wall durations
4. **AskUserQuestion idle** — human-wait, separate column, excluded from compute total
5. **Main-loop reasoning (residual)** — session wall minus buckets above
...and bucket session **tokens/cost** from Claude Code transcripts (`~/.claude/projects/**`, main-loop + subagent files) into:
6. **Sessions ranked by cost** (window mode) — main $ vs subagent $ vs total $ per session, plus a per-command rollup; or **one session's deep-dive** (`--session-id`) — cost by main/sidechain × model tier, agent roster, top cache-rebuild calls, cold-start share
Outputs a markdown report at `.reports/profile/<UTC-timestamp>/report.md` plus a `.temp/output-profile-...md` copy: per-session clock table, per-skill clock rollup, top-N longest single calls, plus a `## Tokens & cost` section scoped to the same window / `--session-id`.
NOT for: per-line Python perf (use `foundry:perf-optimizer`); known failure diagnosis (use `/foundry:investigate`); a real billing statement (prices are public list rates, not effective plan rates).
</objective>
<inputs>
- **`--since DURATION`** (default `24h`) — window: `NNs|NNm|NNh|NNd`
- **`--session-id ID`** — optional; restrict to one session
- **`--top-n N`** (default `5`) — slowest single calls to list
If $ARGUMENTS empty, default window is 24h.
</inputs>
<workflow>
**Task tracking**: TaskCreate two tasks up front — 1 "Run analyzers + render report" (Steps 1–3), 2 "Step 4b: Print report header" (Step 4). Mark each `in_progress` before its first tool call; 1 completed once `report.md` exists, 2 completed right after the header and path are printed, before the executive summary.
## Step 1: Parse args + create run dir
```bash
export CSID="${CLAUDE_CODE_SESSION_ID:-$PPID}"
# timeout: 5000
SINCE="24h"
SESSION_ID=""
TOP_N="5"
for tok in $ARGUMENTS; do
case "$tok" in
--since=*) SINCE="${tok#--since=}" ;;
--since) next_is_since=1 ;;
--session-id=*) SESSION_ID="${tok#--session-id=}" ;;
--top-n=*) TOP_N="${tok#--top-n=}" ;;
*)
if [ "${next_is_since:-0}" = "1" ]; then SINCE="$tok"; next_is_since=0; fi
;;
esac
done
STAMP="$(date -u +%Y-%m-%dT%H-%M-%SZ)"
REPORT_DIR=".reports/profile/$STAMP"
mkdir -p "$REPORT_DIR"
{
echo "REPORT_DIR=$REPORT_DIR"
echo "SINCE=$SINCE"
echo "SESSION_ID=$SESSION_ID"
echo "TOP_N=$TOP_N"
} | tee "${TMPDIR:-/tmp}/foundry-profile-state-${CSID}"
```
Values persisted to `${TMPDIR:-/tmp}/foundry-profile-state-${CSID}`; Steps 2–3 re-source it (bash state does not persist across Bash calls, and `REPORT_DIR` carries a per-shell timestamp that cannot be re-derived).
## Step 2: Run analyzers — clock time, then tokens/cost
```bash
export CSID="${CLAUDE_CODE_SESSION_ID:-$PPID}"
# timeout: 60000
. "${TMPDIR:-/tmp}/foundry-profile-state-${CSID}" 2>/dev/null # reload REPORT_DIR/SINCE/SESSION_ID/TOP_N (fresh shell)
OPT_SID=""
[ -n "$SESSION_ID" ] && OPT_SID="--session-id $SESSION_ID"
python "${CLAUDE_PLUGIN_ROOT:-plugins/cc_foundry}/bin/timing_analyzer.py" \
--since "$SINCE" \
--top-n "$TOP_N" \
--output "$REPORT_DIR/report.md" \
$OPT_SID 2>"$REPORT_DIR/warnings.log"
echo "time_exit=$?"
```
`OPT_SID` left unquoted so empty expands to nothing (no flag). Exit code 1 → no sessions in window — surface that and stop; nothing in Step 2b can rescue a missing clock report, since `enforce-profile-header.js` keys on `report.md` specifically.
## Step 2b: Run analyzer — tokens/cost (best-effort, appended)
```bash
export CSID="${CLAUDE_CODE_SESSION_ID:-$PPID}"
# timeout: 60000
. "${TMPDIR:-/tmp}/foundry-profile-state-${CSID}" 2>/dev/null # reload REPORT_DIR/SINCE/SESSION_ID/TOP_N (fresh shell)
OPT_SID=""
[ -n "$SESSION_ID" ] && OPT_SID="--session-id $SESSION_ID"
python "${CLAUDE_PLUGIN_ROOT:-plugins/cc_foundry}/bin/cost_analyzer.py" \
--since "$SINCE" \
--top-n "$TOP_N" \
--output "$REPORT_DIR/cost.md" \
$OPT_SID 2>>"$REPORT_DIR/warnings.log"
COST_EXIT=$?
if [ "$COST_EXIT" -eq 0 ] && [ -s "$REPORT_DIR/report.md" ]; then
printf '\n' >> "$REPORT_DIR/report.md"
cat "$REPORT_DIR/cost.md" >> "$REPORT_DIR/report.md"
fi
echo "cost_exit=$COST_EXIT"
```
Separate data source (transcripts under `~/.claude/projects/**`, not `timings.jsonl`), separate script, same `--since`/`--session-id`/`--top-n` scoping. `cost_exit=1` means no transcripts fell in the window (or no match for `--session-id`) — that is not fatal: the clock report still ships without a `## Tokens & cost` section. The two analyzers never share a report path write; only `report.md` is append-target and only after `cost_exit=0`, so a cost-side failure cannot corrupt or block the clock report.
## Step 3: Mark run complete
```bash
export CSID="${CLAUDE_CODE_SESSION_ID:-$PPID}"
# timeout: 5000
. "${TMPDIR:-/tmp}/foundry-profile-state-${CSID}" 2>/dev/null # reload REPORT_DIR/SINCE/SESSION_ID/TOP_N (fresh shell)
echo '{"status":"complete","since":"'"$SINCE"'","session_id":"'"$SESSION_ID"'","top_n":'"$TOP_N"'}' > "$REPORT_DIR/result.jsonl"
```
## Step 4: Emit terminal output
Read YAML header from `$REPORT_DIR/report.md` (first block between `---` lines) and render as a two-column Markdown table (`Field | Value`, one row per key, file order) per quality-gates.md §Report File Format's Universal terminal-print rule — never print the raw `---`-delimited block. Then print `→ $REPORT_DIR/report.md`. Then read Headline split block plus top 3 sessions from per-session table, and — when a `## Tokens & cost` section is present — the window total or single-session total cost line, and surface both as executive summary (per quality-gates.md output routing).
Also Write the long-output dump per quality-gates rule:
```text
Write(file_path=".temp/output-profile-<branch>-<YYYY-MM-DD>.md", content=<full report contents>)
```
Where `<branch>` = `$(git branch --show-current 2>/dev/null | tr '/' '-' || echo 'main')`.
Backed structurally by `hooks/enforce-profile-header.js`: while the Step 1 state file is live and `$REPORT_DIR/report.md` is absent, Step 5's `AskUserQuestion` is denied, so the gate can never be reached from an ad-hoc in-context summary.
## Step 5: Follow-up gate
Invoke `AskUserQuestion` (denied by `enforce-profile-header.js` until Step 2 has written `report.md` — if the analyzer found no sessions, report that and stop instead of asking):
- (a) Drill into slowest session — re-run with `--session-id <id>`
- (b) Re-run with different window (`--since 7d`, `--since 30d`)
- (c) Skip — done
</workflow>
<notes>
- **Scope vs `/foundry:investigate`**: investigate diagnoses failures; profile measures wall time when things ran fine but slow.
- **Scope vs `foundry:perf-optimizer`**: perf-optimizer profiles Python/ML code (CPU/GPU/IO); profile measures Claude Code session wall time.
- **No model split on the clock side**: timings.jsonl `model` field is 100% null in the current task-log.js payload — the clock report does not break down by model tier. Documented in report Confidence Gaps. The `## Tokens & cost` section *does* break down by tier, but from a different data source (transcripts, not timings.jsonl) — the two never merge into one table.
- **Subagent internals invisible to the clock side**: `timings.jsonl`'s hook fires only in the main Claude Code process; subagent internal tool calls do NOT hit it, so the reasoning bucket underestimates when subagent spawns dominate. The cost side does not have this gap — it reads each session's `subagents/agent-*.jsonl` transcripts directly, so subagent token spend is included, not inferred.
- **Background agent join**: rows with `duration_ms < 1s` (likely `run_in_background=true`) are matched against invocations.jsonl `started→completed` pairs by `(agent, desc)` substring within ±60s window. Concurrent same-type spawns may mispair.
- **Bash clip**: any `duration_ms > 1h` for `tool=Bash` is clipped at 3,600,000 ms to avoid runaway-shell pollution; clip count surfaced in legend.
- **Cost window filtering**: `cost_analyzer.py` uses each transcript's own row `timestamp` field for the `--since` cutoff (file mtime is only a cheap pre-filter to skip old files before parsing them), so the window is as accurate as the clock side's.
- **Prices are public list rates**: `## Tokens & cost` dollar figures are proportional truth (useful for ranking and comparing), not a billing statement — effective plan rates may differ. Per-command `session $` also attributes a session's whole cost to every command it ran, so that column ranks, never sums.
- **Cost section is best-effort**: if `cost_analyzer.py` finds no transcripts in the window (or no match for `--session-id`), it exits 1 and the `## Tokens & cost` section is simply omitted — the clock report still ships.
- **Read-only**: skill never edits source files. No commits, no pushes.
</notes>