# Developer documentation For working on Skrongle's code. Start with `CLAUDE.md` in the repository. - [Architecture](architecture): how the server is built, the database schema, configuration, deployment. - [Testing locally](testing): dev login, seed data, answering the model's requests by hand or from fixtures, `data-testid` hooks, browser tests. - [QA-testing a pull request](qa): clicking through a PR, leaving e2e specs behind, writing the merge verdict. - [E2E coverage audit](e2e-audit): every flow the browser tests walk, set against every route and surface, with the gaps and what to add next (a snapshot of 2026-10-17). - [Languages (i18n)](i18n): the app's own text in the learner's language, one `i18n/.yaml` per language. - [Security review](security-review): what was checked before going public, what was fixed, and the risks accepted. - [Scalability](scalability): what breaks first if 10,000 people sign up in one day. It has measured numbers, ranked bottlenecks, the first five fixes. [On AWS](scalability-aws) asks the same for the cloud stack alone. - [Load testing](load-testing): a proposal for spike-testing the app with k6 on the Mac, in a sized Docker container and on a throwaway AWS stack, so bottlenecks show up before a crowd does. - [AWS setup](aws-setup): the account, IAM user, keys and tools needed before `scripts/deploy-all.sh aws`. - [Pricing Skrongle AI](pricing) — the AI Skrongle provides on its own key, what each plan includes, the list prices and the margin. The contract between content and code is the [course format](course-format) and its [JSON Schema](course.schema.json): `src/ai.rs` embeds the format in the generator's prompt, and `cargo test` checks the schema against the test course. Change a lesson field and you change both. The user guides (`getting-started`, `course-structure`, `making-courses`, `using-themes`, `faq`) link to those pages instead of copying field tables; keep them true when a feature changes. The sidebar is `SECTIONS` in `src/routes/docs.rs`; `/llms.txt` is `docs/llms.txt`. ## Working with Claude Most changes here are made by Claude Code sessions. A session reads into one context window, and a window filled with file dumps forgets the start of the task. These habits keep it small: - One task or issue per session. Each orca workspace is its own worktree with its own session; start a new workspace for a new issue. The `backlog-sweep` and `qa` skills already give each issue or finding its own agent. - Explore in a subagent. Questions like "where is this handled" or "which files read this field" go to a subagent, which reads the files and returns the answer. The main window keeps the change and the test output. - Run `/clear`, or open a new workspace, when you switch to an unrelated task. Old file contents from the last task only take up room. - Name sessions after the issue (`/rename 913 session habits`), so you can find and resume the right one later. - Read the module layout in [Architecture](architecture) before grepping. It names the file for most areas, which saves a search. - Keep the auto-memory index short. `MEMORY.md` loads into every session and stops loading past 200 lines or 25 KB; on 2026-10-25 it was at 101 lines and 19.5 KB. Write each entry as one line pointing at its own file, and merge old entries on the same topic into one. `CLAUDE.md` asks compaction to keep the issue number, the files changed and the test or spec commands used, so a long session can carry on after `/compact`. ## Rotation `/rotate` (#1136) starts four Orca workspaces at once, each with the bare prompt `/`: `/mergeme` lands the PRs marked mergeme, `/backlog-sweep` opens PRs for workable issues, `/pr-qa-demo` QAs the other open PRs, and `/qa` has Jev explore the site and file `[qa]` issues (labelled `needs grooming`, with screenshots). Run it twice a day. The four skills are written for this shape (#1192): nobody is watching, so none of them stops to ask. A question only you can answer goes to the Review Desk's Decisions mode as one file written with `scripts/review-desk/ask.py`; a PR that isn't ready comes back to the desk's PR queue; a doubtful finding is filed for grooming in its Issues mode. The backlog sweep also asks about what is stuck: issues a merged PR already did, old blocked ones, explorations and hardware items, and issues that read like a bad idea. Each session's agent limit comes from `.claude/skills/rotate/scripts/budget.sh`, which assumes all four share the disk. Each skill adds a line to its log in `~/skrongle-workflow/log/` (`rotate.log`, `mergeme.log`, `backlog.log`, `pr-qa.log`, `qa.log`) when it ends. ## Review Desk A small page on your Mac that walks through the PRs waiting for review, one at a time (#1121). Start it from the workspace you are in: ```sh scripts/review-desk/review # opens the page in your browser REVIEW_DESK_DRY_RUN=1 scripts/review-desk/review # prints GitHub and Orca changes instead of making them ``` It runs that workspace's copy of the desk and reads the repo from it, not from the main checkout. To type just `review` in any workspace, add this to `~/.zshrc`: ```sh unalias review 2>/dev/null function review { "$(git rev-parse --show-toplevel)/scripts/review-desk/review" "$@"; } ``` `unalias` clears an older `review` alias; without it zsh expands the alias inside the function line and stops with a parse error. It shows every open PR with a `## QA: PR #N` report that isn't a draft and isn't labelled `mergeme` or `needs work`. A red card names what is wrong (CI red or still running, QA says not ready, conflicts with main, changed since QA). Press **M** to label `mergeme`, **W** for needs work, **S** to skip, **U** to undo for a few seconds, and the arrow keys to move without marking. **W (needs work)** asks "What should the agent fix?" and needs at least 3 words. Start runs, in order: make the `needs work` label if the repo has none, add it, post your text as a `## Needs work` comment, then open an Orca workspace that runs `/pr-fix N`: `orca worktree create --name fix-pr-N --pr N --agent claude --prompt "/pr-fix N"`, with `--model` and `--effort` from `config.json` (`fix_agent_model`, `fix_agent_effort`). Your text only goes to GitHub; the agent reads it there. If a step fails, the desk stops and says which one. When `fix_agent_limit` (3) `fix-pr-*` workspaces are open, it warns first. A needs work can't be undone here: close the Orca workspace to stop the agent. **Run mergeme** shows after the last PR, with a tally. It asks "Start mergeme for N PRs?" and then opens a `mergeme-` workspace that runs `/mergeme`. It is greyed out while a `mergeme-*` workspace is open. The header shows the last line of `~/skrongle-workflow/log/mergeme.log`. If Orca isn't running, the desk runs `orca open` first. If that fails, it shows the command to copy. **Issues** (the switch next to the name, or `#issues` at the end of the URL) walks through the open issues waiting for grooming, oldest first: a `[qa]` or `[needs grooming]` tag in the title (any case), or the `needs grooming` label (#1139). Each card shows the issue's text and a Title box. Edit the title and press **Enter** to save it. **D** swaps the text for a box with its Markdown, so you can edit the description too (#1194); **Cmd-Enter** saves from there, and **D** again shows it rendered, with your unsaved changes. One save sends what changed (`gh issue edit N --title=... --body-file -`). **X** takes the tags out of the title box for you, **E** puts the cursor in it, **C** closes the issue (`gh issue close N`), **S** skips, and **U** undoes for a few seconds: it reopens a closed issue, or puts the old title and description back. Saving changes only the issue's text; the `needs grooming` label stays, so an issue with the label shows again after Reload. **Decisions** (the third switch, or `#decisions`) lists the questions that block work, one per issue or PR (#1163). The factory skills write them to `~/skrongle-workflow/decisions/` with `scripts/review-desk/ask.py`, one JSON file each (the format and the rules are in `.claude/skills/backlog-sweep/references/decisions.md`). Pick an option if the question offers some, and write your answer in the box; it saves as you type. **Build prompt** turns every answered question into one prompt for an agent: a short paragraph saying these are your decisions and which skill's method to follow for each kind of answer (build it, change the PR, close it, label it), then the issue or PR number, the question and your answer for each. Paste it into any Claude session on the Mac. **Copy** copies it and marks those questions sent, so they don't show again. **Drop** hides a question that no longer needs an answer. - Code: `scripts/review-desk/` (Python standard library only). Tests: `cd scripts/review-desk && python3 -I -B -m unittest`. - Settings and logs: `~/skrongle-workflow/` (`REVIEW_DESK_HOME` picks another folder). `config.json` is made on the first run. `log/actions.log` has every action and command. - Demos: read from `~/skrongle-demos/pr-/` (the format is in `.claude/skills/pr-qa-demo/references/manifest.md`). - It listens on `127.0.0.1` only, with a new random key in the URL each start. Stop it with Ctrl-C.