[pauldambra]

Robot:

Problem

Developers use the CI journal to check failed ideas, but implementation notes obscure its lessons.
Why: Keep the journal focused on previous attempts and reasons not to repeat them.

Changes

• Remove implementation notes from seven PRs; keep recorded lessons and traps.
• Require DevEx approval for changes to this file through CODEOWNERS.

How did you test this code?

Checked Markdown formatting, preflight checks, and ownership with the repository CODEOWNERS matcher.

Test rationale: Documentation and ownership only; no new tests needed.

Release status

• No feature flag controls this change

Docs update

• Updates the existing CI journal.

🤖 Agent context

Autonomy: Human-driven (agent-assisted)

Agent: PostHog Slack app (Codex), GPT-6

Skills: /establishing-code-ownership, /verifying-changes, /running-ci-preflight, /hogli, /writing-pr-descriptions.

More context for AI agents

• Read closely: Only the seven identified implementation-note additions are removed. Mixed entries remain.
• Decisions: No matching open PR found. The diff contains documentation and ownership changes only.

---

Created with PostHog from a Slack thread

[trunk-io]

Merging to master in this repository is managed by Trunk.

• To merge this pull request, check the box to the left or comment /trunk merge below.

After your PR is submitted to the merge queue, this comment will be automatically updated with its status. If the PR fails, failure details will also be posted here

[parameterai]

Risk: No findings

This change deletes implementation-note lines from the internal CI lessons journal and adds that journal to the Devex team's CODEOWNERS entries so future edits require their review. It touches no code, workflows, or configuration, and the ownership addition strengthens rather than weakens review gating; no security issues found.

_{Sentinel reviewed d34239e · Review settings}

[github-actions]

🤖 CI report

✅ Trunk lane — non-backend lane (ownership)

This PR is assigned to the non-backend lane (ownership). It does not run backend Python tests and may merge in parallel with PRs in other lanes.

[posthog-security-review-bot]

✅ Security review complete — d34239e1d4fa

No findings above the confidence threshold, in 2 min.

_{Add the security-review label to run again on the latest commit.}

[posthog-security-review-bot]

Agent-driven security review - no findings.

[hosthog]

HostHog preview — posthog-desktop-web

Latest build (d34239e): https://7e01162f25a74c4c92a10fb6f307d421.hosthog.dev

Employee-gated; every push gets a fresh URL whose content never changes. All previews stop serving when the PR closes.