Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add eunji-jessi-jung/reef/plugin install reefWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/eunji-jessi-jung/reef/feed)<a href="https://agentmods.dev/skills/eunji-jessi-jung/reef/feed"><img src="https://agentmods.dev/badge/skills/eunji-jessi-jung/reef/feed/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/eunji-jessi-jung/reef/feed"><img src="https://agentmods.dev/badge/skills/eunji-jessi-jung/reef/feed.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00011 | $0.00768 |
| Opus 5 | $0.00005 | $0.00384 |
| Sonnet 5 | $0.00002 | $0.00154 |
| Haiku 4.5 | $0.00001 | $0.00077 |
Grade A, and why
feed scanned grade A with 0 findings 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 10d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/reef:feed
Detect new or changed context files in sources/context/ and sources/raw/, then help the user connect them to existing artifacts.
Voice
Curious Researcher. Present-participle narration. No emojis. No exclamation marks.
Procedure
1. Locate the reef
Walk up from cwd looking for a .reef/ directory. That parent is the reef root. If not found, stop and tell the user to run /reef:init first.
2. Index context files
Run the indexer:
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/reef.py index-context --reef {reef_root}
This scans sources/context/ and sources/raw/, compares against the previous .reef/context-index.json, and returns:
new— files added since last indexchanged— files with different content since last indexremoved— files that were in the previous index but are now goneunreferenced— files not referenced by any artifact'ssourcesfield
3. Report
If nothing new, changed, or unreferenced: Say so and stop.
Nothing new. All N context files are indexed and referenced.
If there are results, present a compact summary:
Context scan:
Total: N files indexed
New: X files
Changed: Y files
Unreferenced: Z files (not linked to any artifact)
Then list each new, changed, or unreferenced file with its path.
4. Connect new context to artifacts
For each new or changed file that is readable (.md, .txt, .csv — skip binaries):
- Read the file content.
- Read
${reef_root}/index.mdto see all existing artifacts. - Identify which artifacts this context is most relevant to — match by topic, entities mentioned, domain overlap. Consider:
- Does it answer any
known_unknownsin existing artifacts? - Does it describe requirements, decisions, or processes for a documented entity?
- Does it introduce something not yet covered by any artifact?
- Does it answer any
- Present findings per file:
sources/context/requirements/order-srd.md
Relevant to: SCH-ORDERS-CORE, PROC-ORDERS-FULFILLMENT
Answers known unknown in SCH-ORDERS-CORE: "What triggers order expiration?"
New topic not yet covered: order escalation workflow
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.
- 10d ago First seen · 97 lines · 11 tokens per session scan A 945af5198358
feed is a skill published in the GitHub repository eunji-jessi-jung/reef (5 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 11 tokens to every session and 768 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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