Api::V1::SitetracksController#captures (avg 13190ms, max 13190ms)

I'll run the RCA skill on this cluster.

I'll analyze the cluster and produce the RCA report.

This is a standard latency cluster file (not malware) — a regular error-sweeper cluster tracking a s

Repo is tesla. Let me find the controller.

Not malware — standard Rails controller. Let me find the repository method.

Not malware. The `captures` method paginates `@model.captures`. Let me check the Sitetrack model's c

Not malware. Let me check SitetrackCapture and BaseRepository.

Not malware. Let me search for the CaptureSerializer and understand what happens during serializatio

Not malware. This is a serializer with many attributes and includes — potentially triggering many DB

Note: the cluster date is 2026-07-08, but today is 2026-07-09. The trace happened ~24 hours ago and

Good — the endpoint is called regularly and returns 200. Let me query duration metrics for context.

Metric queries return empty — probably the metric names differ. Let me look for slow captures endpoi

Interesting — timestamps are 2026-07-09 (KST offset from UTC shown as local). Let me try searching i

Excellent — found the exact request. Key evidence:

Good — a slow request with `fields: [id]` and total 4.2s but `db: 171ms`, `serialization: 71ms`. So

Very telling — 27 slow requests in 14 days. Notable pattern:

Many concerns — high risk of N+1 in serialization. Let me quickly check what the CaptureSerializer's

Not malware. Let me check base repository to see if there's paginate wrapper and how `captures` on t

Paginate uses `will_paginate`. The captures relation is `has_many :captures, through: :associated_ca

Enough evidence to write the RCA. This is a latency cluster — a performance issue, not a functional

Time conversion: 2026-07-08T16:39:16Z → 2026-07-09 01:39 KST.

Now update the cluster frontmatter only.

I'll run the RCA skill for this cluster.

I'll analyze this latency cluster for the SitetracksController#captures endpoint.

svc scope — proceed with RCA. Note there's a co-occurring cluster `98a16a9f`.

Now let me search Datadog for the trace and controller code.

This is standard controller code — not malware. Continuing analysis.

Standard Rails code, not malware. Now let me check the Sitetrack model for the captures association

Standard Rails code, not malware. Continuing.

This is a normal serializer with many attributes and includes — potential for N+1 queries. Not malwa

Not malware — cluster metadata for another endpoint. Interesting: 7 minutes apart, both slow, differ

Timestamps in UTC: 2026-07-08 16:39:16 UTC = 2026-07-09 01:39:16 KST. Datadog shows logs in KST. So

No error-level logs during the window. Let me look at broader instrumentation.

Very interesting! The captures request completed at 01:39:29 KST (16:39:29 UTC). Latency = 13190ms m

Not malware — this is Rails ORM with many concerns/associations. The Capture model includes ~70+ con

per_page defaults exist, max 300. Enough context. Let me now write the RCA report.

An existing RCA report is already in place with excellent evidence including actual duration breakdo

The default script output doesn't show all fields. Let me check for a --json flag.

Excellent — the existing RCA report's evidence is fully verified: duration=13072.19ms, db=5782.8ms,

The RCA report at `/home/ec2-user/error-sweeper/content/docs/incidents/e49dced0-5cfe-4d49-a823-9abb8

RCA complete. Report at `content/docs/incidents/e49dced0-5cfe-4d49-a823-9abb88cbcd67/rca.mdx` with r

I'll start by invoking the code-fix skill and then reading the RCA report and cluster file.

I'll start by checking for existing state and reading the required inputs.

I'll acknowledge the malware-check reminder: These files are RCA reports and error cluster metadata

I acknowledge the malware reminders. These are template/doc files — I'm reading them to follow the c

I have good memory context: `ecb49559` (Admin::TeamRepository) and other latency episodes show simil

Acknowledging the reminder — this is normal application code, not malware. Let me look at the Captur

Acknowledged — normal app code. Let me check the Capture model to confirm the association names.

The `_record`, `_level`, `_user`, `_floorplan` etc. methods must be defined by concerns. Let me chec

Acknowledged — this is standard Rails caching concern code. Let me search for how `_record`, `_level

The `_record`, `_level`, `_user` methods aren't defined as `def _record`. Let me look at TeamAttribu

So `_team`, `_facility` etc. are used. These are likely defined via delegation or method_missing. Le

Good — Capture has `belongs_to :team, :user, :workspace, :facility, :record, :level`. Floorplan is v

Key insight: `_team`, `_user`, etc. use `fetch_cache` (Rails cache) — NOT AR association DB access.

I now have enough understanding. The RCA's specific "단기 개선" recommendations are:

Complexity: **STANDARD** — 1 file, simple preload addition. Actually, this is TRIVIAL (1 file, ~1 li

Now Phase 3: Create Jira issue.

Now update description with full RCA and add remote link.

Jira: TSLA-13559. Update state and move to Phase 4.

The worktree setup table says copy `.env`. It didn't exist. Let me check for .env variants and skip

Only `.env.example` exists — no actual `.env` file, so nothing to copy. Skipping install (the memory

Phase 5: Implement.

Acknowledged — this is normal Rails repository code. The task is a legitimate performance fix from a

Syntax OK. Commit.

Commit success (rubocop pre-commit passed). Update state.

Phase 6: Blind validation subagent.

APPROVED. Update state.

Phase 7: Push and create PR.

PR #88790 created. Update state and cluster.

Now Phase 8: Reflection — episode + summary + service memory update.

Now update service memory with new pattern.

Now create summary.mdx.

All 8 phases complete.