Borrowing it
Nothing to install: this file belongs to gopalrajsuresh/covalent-bond. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/gopalrajsuresh/covalent-bond/main/.claude/skills/covalent-bond-run/SKILL.mdgit clone --depth 1 https://github.com/gopalrajsuresh/covalent-bondWrote 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/gopalrajsuresh/covalent-bond/covalent-bond-run)<a href="https://agentmods.dev/skills/gopalrajsuresh/covalent-bond/covalent-bond-run"><img src="https://agentmods.dev/badge/skills/gopalrajsuresh/covalent-bond/covalent-bond-run/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/gopalrajsuresh/covalent-bond/covalent-bond-run"><img src="https://agentmods.dev/badge/skills/gopalrajsuresh/covalent-bond/covalent-bond-run.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 | $0.00077 | $0.01071 |
| Opus 5.5 | $0.00031 | $0.00428 |
| Sonnet 5.5 | $0.00015 | $0.00214 |
| Haiku 4.5 | $0.00008 | $0.00107 |
Grade A, and why
covalent-bond-run 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 1mo 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.
| `Relay health check failed` | Check `COVALENT_RELAY_URL`; `curl <relay>/health` should return `{"status":"ok",...}` | How it starts
The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Running Covalent Bond
Covalent Bond pairs two AI coding agents on different machines over an end-to-end-encrypted channel. This skill covers setup, pairing, and troubleshooting. It assumes Node.js v18+.
1. Install
npm install
npm test # confirms the build works (uses an in-process mock relay)
2. Choose a relay
The two machines connect through a relay. Options:
- Local mock relay (dev / same-network testing):
npm run relay:devstarts one onhttp://localhost:8787. Point both sides at it withCOVALENT_RELAY_URL=http://localhost:8787. - Deployed Cloudflare Worker (real cross-machine use): set
COVALENT_RELAY_URL=https://<your-worker>.workers.dev. Deploying one is a maintainer task; see the deploy skill /cloudflare-worker/README.md.
The relay never sees plaintext, keys, or the session code.
3. Register the MCP server with the agent
Claude Code:
claude mcp add --scope user covalent -- node /absolute/path/to/covalent-bond/bin/cli.js
Other MCP clients (Cursor, Codex, Windsurf, Cline, …): add a stdio MCP
server whose command is node /absolute/path/to/covalent-bond/bin/cli.js. Set
COVALENT_RELAY_URL in the server's environment, or copy .env.example to
.env in the covalent-bond folder (the server reads it at startup; a real
environment variable takes precedence).
4. Pair two agents
The nine tools are bond_connect, bond_join, bond_send, bond_message,
bond_wait, bond_accept,
bond_decline, bond_status, bond_end.
- Machine A (host): ask the agent to "create a Covalent Bond session" →
it calls
bond_connectand returns a session code likeAbCd-1234-XyZw. - Share the code with Machine B out-of-band: chat, voice, in person. Never paste it into the relay; its secrecy is what secures the channel.
- Machine B (guest): "join Covalent Bond session AbCd-1234-XyZw" → it
calls
bond_join. - Check
bond_statuson both until it shows Secure channel established. - Send a file: "send
src/auth.jsto my peer" →bond_send. The peer sees a consent prompt and mustbond_acceptbefore the file is written. - End: "end the Covalent Bond session" →
bond_end.
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.
- 1mo ago First seen · 93 lines · 77 tokens per session scan A 4be3784f2ca1
covalent-bond-run is a skill published in the GitHub repository gopalrajsuresh/covalent-bond (0 stars, last pushed 7d ago), licensed MIT. It adds 77 tokens to every session and 1,071 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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