stage-data

name	stage-data
categories	["research"]
description	Pre-flight resource gate for the research recipe. Reads the experiment plan's data_manifest, checks disk space and network connectivity for external/gitignored entries, creates data directory structure, and emits a PASS/WARN/FAIL feasibility verdict.
hooks	{"PreToolUse":[{"matcher":"*","hooks":[{"type":"command","command":"echo '[SKILL: stage-data] Checking resource feasibility...'","once":true}]}]}

Stage Data Skill

Pre-flight resource gate for the research recipe. Reads the experiment plan's data_manifest frontmatter section, checks available disk space and network connectivity for external and gitignored data source entries, creates the required data directory structure in the worktree, and emits a PASS/WARN/FAIL feasibility verdict. PASS and WARN proceed to implementation; FAIL escalates immediately with a detailed resource feasibility report rather than wasting compute on doomed downloads.

When to Use

• Invoked by the research recipe's stage_data step between create_worktree and decompose_phases
• Whenever a pre-flight resource check is needed before data-intensive implementation

Arguments

/autoskillit:stage-data <experiment_plan_path>

• experiment_plan_path — Absolute path to the experiment plan (positional). Default: $AUTOSKILLIT_TEMP/experiment-plan.md in the current working directory.

Critical Constraints

NEVER:

• Modify the experiment plan
• Modify any source files
• Write files outside {{AUTOSKILLIT_TEMP}}/stage-data/
• Emit a WARN or FAIL verdict without a specific, actionable explanation
• Run subagents in the background (run_in_background: true is prohibited)

ALWAYS:

• Read the data_manifest frontmatter section of the experiment plan
• Check ONLY external and gitignored source_type entries (synthetic and fixture entries require no disk space or network access)
• Create data directories for every entry whose location field is non-null, using mkdir -p
• Write the resource feasibility report before emitting the verdict token
• Use model: "sonnet" for all subagents

Workflow

Step 1 — Parse the Experiment Plan

Read the experiment plan at the provided path (or default path). Parse the data_manifest YAML frontmatter section. Identify all entries where source_type is "external" or "gitignored".

Step 2 — Short-Circuit for Synthetic/Fixture-Only Plans

If no external or gitignored entries exist, skip disk and network checks. Create any data directories for entries with non-null location. Emit verdict = PASS and exit.

Step 3 — Launch Parallel Resource Probe Subagents

Launch parallel subagents — one per external/gitignored entry — each performing:

a. DISK SPACE AGENT: Run df -k . to get available bytes in the worktree. Estimate storage need from the entry's description field using LLM reasoning (e.g., "10-50GB h5ad files" → project 50GB worst case). Compute headroom:

If available_bytes == 0 (filesystem completely full), emit FAIL immediately — do not proceed to the formula below.

headroom_pct = (available_bytes - projected_bytes) / available_bytes * 100

Disk space verdict thresholds:

• FAIL: projected_bytes > available_bytes (negative headroom)
• WARN: 0 < headroom_pct < 20 (less than 20% remaining)
• PASS: headroom_pct >= 20

b. NETWORK PROBE AGENT: Infer the API base URL from the acquisition field. Known endpoints to probe:

• GEO / NCBI: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/einfo.fcgi Rate limit: 3 req/s without API key, 10 req/s with NCBI API key. Single probe is well within limits.
• ENCODE: https://www.encodeproject.org/ Rate limit: no published hard limit; courtesy throttle expected at high volume.
• UniProt: https://rest.uniprot.org/uniprotkb/search?query=reviewed:true&size=1 Rate limit: undocumented; size=1 keeps payload ~1KB.
• Allen Brain Atlas: https://api.brain-map.org/api/v2/data/Gene/query.json?num_rows=1 Rate limit: no published limit; public API. num_rows=1 keeps response ~200B.
• CellxGene: https://api.cellxgene.cziscience.com/dp/v1/collections Rate limit: CDN-backed, no published limit. HEAD avoids 53KB collection list.
• Expression Atlas: https://www.ebi.ac.uk/gxa/json/experiments Rate limit: no published hard limit (EBI courtesy policy). CRITICAL: response is ~2.6MB — always use HEAD (curl -sI), never GET.
• Human Protein Atlas: https://www.proteinatlas.org/api/search_download.php?search=CD8A&columns=g&compress=no&format=json Rate limit: no published limit; public API. columns=g is required (API returns 400 without it). Response ~20B.
• STRING: https://string-db.org/api/json/version Rate limit: ~10 req/s for programmatic access. Version endpoint returns 84B — ideal probe.
• JASPAR: https://jaspar.elixir.no/api/v1/matrix/?page_size=1 Rate limit: no published limit (academic resource). Note: domain migrated from genereg.net to elixir.no. page_size=1 keeps response ~330B.
• For unrecognized sources: attempt a HEAD request to any URL found in the acquisition field.

Run: curl -sI --max-time 10 <endpoint> and inspect HTTP status:

• FAIL: connection refused, timeout, or 5xx response
• WARN: 4xx response (auth required but endpoint reachable)
• PASS: 2xx or 3xx response

Network connectivity check: the WARN condition indicates the endpoint is reachable but authentication may be needed. A network reachability issue produces FAIL.

Step 4 — Create Data Directory Structure

For every entry whose location field is non-null, run:

mkdir -p <worktree_cwd>/<location>

This creates the data dir hierarchy required by the experiment implementation.

Step 5 — Synthesize Overall Verdict

Aggregate results across all entries:

• FAIL if ANY entry produced a FAIL result (disk or network)
• WARN if any entry produced a WARN result and none produced FAIL
• PASS if all entries produced PASS

Step 6 — Write Resource Feasibility Report

Write the resource feasibility report to:

{{AUTOSKILLIT_TEMP}}/stage-data/resource_feasibility_{YYYY-MM-DD_HHMMSS}.md

Report structure:

## Resource Feasibility Report
**Date:** {timestamp}
**Verdict:** PASS | WARN | FAIL

### Disk Space Assessment
| Entry | Source Type | Projected Size | Available | Headroom | Status |
|-------|-------------|----------------|-----------|----------|--------|
...

### Network Connectivity Assessment
| Entry | Endpoint Probed | HTTP Status | Latency | Status |
|-------|-----------------|-------------|---------|--------|
...

### Data Directories Created
- {location}: created | skipped (null location)
...

### Recommended Actions (WARN/FAIL only)
- {specific actionable step to resolve each issue}

Step 7 — Emit Structured Output Tokens

Emit structured output tokens as LITERAL PLAIN TEXT with NO markdown formatting on the token names. Do not wrap token names in **bold**, *italic*, or any other markdown. The adjudicator performs a regex match on the exact token name — decorators cause match failure.

verdict = PASS
resource_report = /absolute/path/to/resource_feasibility_{YYYY-MM-DD_HHMMSS}.md

Output

verdict = PASS|WARN|FAIL
resource_report = /absolute/path/to/{{AUTOSKILLIT_TEMP}}/stage-data/resource_feasibility_{YYYY-MM-DD_HHMMSS}.md