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Add License Header — measured AI agent skill | DecimalAI

sociotechnica-org/add-license-header

SkillScore82Maintained

Add the project's canonical SPDX license header to source files that are missing one. Use when asked to add a license header to a file or directory, e.g. "add the license header to src/foo.ts" or "make sure every file in src/ has our license header."

by sociotechnica-org

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Coding pack

decimalai skills pull sociotechnica-org-add-license-header

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/sociotechnica-org-add-license-header/SKILL.md

Raw file: /s/sociotechnica-org-add-license-header/SKILL.md ↗ · machine-readable summary at /s/sociotechnica-org-add-license-header.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 7d ago

—-33% tokens0% turns82% of whole cases pass with skill (18/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-04	✗→✓	▲ Improved	-35%	0%
case-05	✗→✓	▲ Improved	-40%	0%
case-06	✗→✓	▲ Improved	-26%	0%
case-07	✗→✓	▲ Improved	-6%	0%
case-09	✗→✓	▲ Improved	-30%	0%

Showing 5 of 22 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/1/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

sociotechnica-org / skillmaker-studio

skills/william-draft-skill-md/runs/71a6d789-1b1b-4898-b9bc-d132f8a15d74/artifacts/output/SKILL.md

View on GitHub ↗

License MITImported 8/1/2026Version v4

Skill contents

SKILL.md

Add License Header

Procedure

Identify target files from the user's request -- either a single path or

all source files under a given directory.

For each target file, read its first 20 lines and check whether the string

SPDX-License-Identifier is already present.

If the header is already present, skip that file. Never add a second

header to a file that already has one.

If no header is present, insert this exact two-line header at line 1 of

the file -- above all existing content, including shebangs, comments, or blank lines:

After processing all files, report which files were changed and which were

skipped (already had a header).

Constraints

Never duplicate a header. If SPDX-License-Identifier already appears

in the first 20 lines, the file is considered done -- do not touch it.

Always insert at the very top. The header must be the first content in

the file, above any shebang (#!), existing comment, or code. Do not place it after existing content.

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