| name | annotate-with-claude |
| description | Annotate a small dataset directly inside the Claude Code session — Claude reads each record, applies the locked schema, and writes structured annotations to disk. For datasets where standing up Label Studio or a Gemini batch job would be overkill (typically tens to low hundreds of records). Use when the user says "annotate this dataset", "label these records with Claude", "do the annotations yourself", or "small-scale annotation". |
Annotate With Claude (Interactive, In-Session)
For small annotation jobs where the right tool is just Claude, a schema, and a JSONL file. No batch infra, no UI, no API key — Claude reads each record in turn, applies the schema, writes the output, and moves on. The user supervises (skim, spot-check, course-correct mid-run).
This skill complements scaffold-annotation-env (which sets up Gemini batch inference for larger runs). Choose based on scale and feedback loop:
| Situation | Use |
|---|
| ≤ ~200 records, schema may still need refinement, want tight feedback | annotate-with-claude (this skill) |
| Hundreds to thousands of records, schema is locked | scaffold-annotation-env |
| Mixed: a small calibration set first, then scale | This skill for the calibration set, then scaffold |
Inputs to gather
- Input file — a JSONL where each line is one record. If the source is CSV/Parquet, ask the orchestrator (
shape-dataset) to reshape first. Each record must have a stable id.
- Schema —
schema.json produced by the schema-designer subagent. If absent, run schema-designer first; do not invent a schema mid-run.
- Annotation guidelines — short markdown describing edge cases, decision rules, and "when in doubt" defaults. Usually a sibling of
schema.json.
- Output file — JSONL of annotations. Default:
<workspace>/annotation/claude-annotations.jsonl.
- Confidence/abstain policy — should Claude flag uncertain cases for human review rather than guess? Default yes.
Workflow
1. Preflight
- Load
schema.json and the guidelines into context.
- Read the input file, count records.
- Read the output file if it exists; collect already-annotated
ids so the run is resumable.
- Show the user: N total, M already done, K remaining. Confirm before starting.
2. Propose and commit a job-specific annotation skill
Before any records get annotated, draft an annotation workflow tailored to this dataset and write it as a SKILL.md inside the user's annotation repo. This makes the procedure inspectable, version-controlled, and reproducible — and means a future session (or a different annotator) can replay the exact process.
Where it lives: <repo>/.claude/skills/annotate-<dataset-slug>/SKILL.md if the user is in a Claude-aware repo, or <repo>/skills/annotate-<dataset-slug>/SKILL.md if they prefer a plain skills/ directory. Ask which they want; default to .claude/skills/.
What goes in it: the skill is the per-job operating manual, not a copy of this generic plugin skill. It must include:
- Frontmatter —
name: annotate-<dataset-slug>, a one-line description that names the dataset and task.
- Dataset summary — what the records look like (1–2 sample records, redacted if PII), where they came from, total count.
- Task statement — what we are deciding for each record, in one paragraph.
- Schema reference — relative path to
schema.json plus the inline label set / field shape so a reader doesn't need to context-switch.
- Decision procedure — the ordered steps Claude follows for each record. Concrete to this dataset, not generic. Example for a categorization task: "1. Read the title and first 200 chars of body. 2. If title contains a clear category cue, use it. 3. Otherwise scan body for keyword groups (list inline). 4. If still ambiguous, abstain."
- Edge cases — the actual edge cases observed in this dataset's samples, each with the prescribed handling.
- Abstain rules — concrete triggers ("record has no body text", "language is not English", "schema has no class that fits").
- Output contract — the exact JSONL line shape, including dataset-specific fields beyond the generic ones.
- Resumability and idempotency — where the output JSONL lives and the rule that already-annotated ids are skipped.
- Review hooks — how the user spot-checks (e.g. "every 20th record echoed back inline").
Show the proposed skill to the user before writing. Treat it as the contract for the run — if the user wants the procedure to change, edit the skill, don't just deviate silently. After the user approves, write it to disk and git add it (don't commit unless they ask — many users like to commit the skill alongside the first batch of annotations).
The rest of this workflow (calibration, bulk pass, output format, validation) executes against that committed skill. If the skill says "abstain when language is not English," that rule is binding for the run.
3. Calibration pass
For the first 5–10 records, annotate slowly and visibly:
- Show each record in the chat.
- Apply the schema and explain the reasoning in 1–2 sentences.
- Write the annotation to the output file.
- Ask the user to confirm or correct before moving on.
Calibration surfaces schema gaps fast — it's far cheaper to fix the schema after 5 mislabels than after 200. If the user corrects an annotation, also ask whether the schema or guidelines should be updated; if yes, update them and restart calibration on the corrected set.
4. Bulk pass
After calibration is approved, switch to bulk mode:
- Annotate records in chunks (default 20 per chunk) without per-record commentary.
- After each chunk, show a concise summary: counts per label, any abstentions, any records that hit unusual cases.
- Write each chunk's annotations to the output file as you go (append-only, never rewrite earlier lines).
- Pause between chunks so the user can interrupt, spot-check, or stop.
5. Output format
Each line of the output JSONL:
{"id": "<record id>", "annotations": { ... matches schema ... }, "confidence": "high|medium|low", "rationale": "<one short line, optional>", "abstained": false, "annotator": "claude-<model>", "annotated_at": "<iso8601>"}
If abstained: true, the annotations field may be partial or null and the record is queued for human review.
6. Validation and handoff
When the run finishes (or the user stops):
- Validate every line against
schema.json using the validate_outputs.py helper from scaffold-annotation-env (or inline jsonschema).
- Report: total annotated, abstentions, validation failures, label distribution.
- Suggest next steps: review abstentions, run
review-annotations for a sample audit, or move to hf-setup to publish.
Operating principles
- Schema first, always. Never start annotating without a locked schema. If the schema needs to change mid-run, stop, update it, and decide whether to re-annotate prior records.
- Resumable. The run can be paused and resumed; never re-annotate a record whose
id is already in the output file unless the user explicitly asks for re-annotation.
- Abstain rather than guess. When a record genuinely doesn't fit the schema, set
abstained: true and explain why. Inflated confidence is worse than honest gaps.
- Visibility scales inversely with volume. First 10 records: full reasoning. Bulk: summaries only. End: aggregate report.
- You are the annotator, but the user is the editor. Encourage the user to spot-check and correct. Treat their corrections as ground truth and learn from them in-session.
- Don't fabricate metadata. If you don't have a confident answer for an optional schema field, leave it null rather than inventing one.
