Sharingan

Build a portable repository context bundle and stop there.

Keep this skill consumer-agnostic. Do not invoke adapter-specific workflows.

Core Contract

Follow this fixed lifecycle:

Clone repository into isolated /tmp workspace.
Analyze repository with hybrid retrieval-first context building.
Emit stable artifact contract (artifact.json) and companion files.
Validate artifact contract and checksums.
Exit.

Do not call downstream adapter skills.

Trigger Examples

"Clone this repo and build reusable context"
"Analyze this repo and package context artifacts"
"Prepare portable repo context for another workflow"
"Create a codebase context bundle from this repository"

Quick Start

Run the orchestrator:

scripts/run.sh \
  --repo-url https://github.com/owner/repo.git \
  --ref main \
  --output-dir /tmp/sharingan-output

Expected output:

artifact.json
manifest.json
repo_map.json
chunks.ndjson
selection_trace.json
summary.md
checksums.sha256

Workflow

1) Collect Inputs

Require:

repo-url

Optional:

ref
depth
tmp-root
output-dir
file and runtime limits

2) Clone in Isolated Temp Workspace

Use scripts/clone_repo.sh.

Rules:

Clone under /tmp or configured temporary root.
Use shallow clone by default (--depth 1).
Disable recursive submodule behavior by default.
Treat clone path as ephemeral operational state.

3) Build Context Bundle

Use scripts/build_context_bundle.py.

Build these artifacts:

manifest.json: file inventory and checksums.
repo_map.json: symbols, internal edges, and ranked key files.
chunks.ndjson: chunked code/text units with metadata.
selection_trace.json: ranking reasons and score details.
summary.md: distilled repository briefing with citations.

4) Validate Contract

Use scripts/validate_contract.py artifact.json.

Validation requirements:

required top-level contract fields exist
required nested fields exist
bundle URIs are relative and files exist
checksums file includes all bundle files
no required absolute temp paths in portable fields

5) Stop at Contract Boundary

After validation succeeds, return artifact paths and stop.

Do not auto-run any consumer-specific transformation.

Safety Boundaries

Never execute untrusted repository code by default.
Never auto-run tests, build scripts, or install commands inside cloned repo.
Enforce limits for file count, bytes, and runtime.
Redact obvious secret-like tokens when generating summaries.
Always cleanup temporary directories unless explicitly requested to keep.

For details, read references/safety-and-limits.md.

Artifact Contract

Use schema versioning with additive-only changes in minor versions.

Major: breaking changes
Minor: additive fields
Patch: non-structural fixes

For exact schema, read references/artifact-contract-v1.md.

Downstream Consumer Read Order

To keep downstream context loading lean and reliable, consume bundle files in this order:

artifact.json - entrypoint, status, limits, and portable bundle URIs.
summary.md - high-level repository briefing with citations.
selection_trace.json - ranked file rationale and signal details.
repo_map.json - symbols and dependency edges for navigation.
chunks.ndjson - load selectively by cited chunk IDs and paths.
manifest.json and checksums.sha256 - inventory and integrity verification.

Retrieval Defaults

Use hybrid retrieval-first defaults documented in references/retrieval-defaults.md.

Core behavior:

AST and symbol-aware chunk boundaries
path priors, dependency centrality, and symbol density ranking blend
deterministic output ordering for reproducibility

Resources

scripts/run.sh - orchestration entrypoint
scripts/clone_repo.sh - isolated clone + metadata
scripts/build_context_bundle.py - bundle generation
scripts/validate_contract.py - contract and checksum validator
references/artifact-contract-v1.md - contract reference
references/retrieval-defaults.md - retrieval strategy and defaults
references/safety-and-limits.md - safety envelope
assets/sample-artifact/ - example artifact bundle