Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/librefang/librefang-registry/redditnpx skills add librefang/librefang-registry --skill redditgit clone --depth 1 https://github.com/librefang/librefang-registryWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00025 | $0.10590 |
| Opus 5 | $0.00013 | $0.05295 |
| Sonnet 5 | $0.00005 | $0.02118 |
| Haiku 4.5 | $0.00003 | $0.01059 |
Grade A, and why
reddit-hand-skill scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -X POST "https://www.reddit.com/api/v1/access_token" \ This is a copy
100% identical to reddit-hand-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 1,088 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Reddit Management Expert Knowledge
Reddit API Reference
Authentication (OAuth2 Script App)
Reddit API requires OAuth2 authentication for all endpoints.
Step 1: Get access token (app-only / client_credentials):
curl -s -X POST "https://www.reddit.com/api/v1/access_token" \
-u "$REDDIT_CLIENT_ID:$REDDIT_CLIENT_SECRET" \
-d "grant_type=client_credentials" \
-A "LibreFang Reddit Hand/1.0"
Response: {"access_token": "...", "token_type": "bearer", "expires_in": 86400, "scope": "*"}
Note:
client_credentialsprovides app-only access. Most read endpoints (listing posts, fetching comments, searching) work normally. Posting and commenting use the app's identity. For full user-level actions (e.g., voting, managing subscriptions), the more complex OAuth2 authorization code flow is required.
All subsequent requests must include:
Authorization: Bearer $ACCESS_TOKEN
User-Agent: LibreFang Reddit Hand/1.0
Core Endpoints
Get subreddit posts (hot):
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" \
-A "LibreFang Reddit Hand/1.0" \
"https://oauth.reddit.com/r/SUBREDDIT/hot?limit=25"
Get subreddit posts (new):
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" \
-A "LibreFang Reddit Hand/1.0" \
"https://oauth.reddit.com/r/SUBREDDIT/new?limit=25"
Get subreddit posts (rising):
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" \
-A "LibreFang Reddit Hand/1.0" \
"https://oauth.reddit.com/r/SUBREDDIT/rising?limit=25"
Submit a new post (self/text):
curl -s -X POST -H "Authorization: Bearer $ACCESS_TOKEN" \
-A "LibreFang Reddit Hand/1.0" \
-d "sr=SUBREDDIT&kind=self&title=TITLE&text=BODY" \
"https://oauth.reddit.com/api/submit"
Submit a link post:
curl -s -X POST -H "Authorization: Bearer $ACCESS_TOKEN" \
-A "LibreFang Reddit Hand/1.0" \
-d "sr=SUBREDDIT&kind=link&title=TITLE&url=URL" \
"https://oauth.reddit.com/api/submit"
Post a comment:
curl -s -X POST -H "Authorization: Bearer $ACCESS_TOKEN" \
-A "LibreFang Reddit Hand/1.0" \
-d "thing_id=FULLNAME&text=COMMENT_TEXT" \
"https://oauth.reddit.com/api/comment"
Note: thing_id is the fullname of the parent (e.g., t3_abc123 for a post, t1_def456 for a comment).
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 1,088 lines · 25 tokens per session scan A abd03b831350
reddit-hand-skill is a skill published in the GitHub repository librefang/librefang-registry (11 stars, last pushed 8d ago), licensed MIT. It adds 25 tokens to every session and 10,590 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 100% identical to reddit-hand-skill, differing in 0 lines, and is treated as a copy.
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