interlinked-harness

A local safety guard that checks coding-agent commands and file edits before they run. It blocks command patterns considered dangerous and can suggest safer alternatives.

In plain words
What is it for?
Use it to understand why a tool call was blocked, respond to guard warnings, or handle a false positive in a safety check.
Why use it?
It reduces the chance of accidentally running destructive commands, changing protected files, exposing secrets, or making unsafe repository changes.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/quentincody/interlinked-cli/interlinked-harness
Any agent
npx skills add QuentinCody/interlinked-cli --skill interlinked-harness
Clone the repo
git clone --depth 1 https://github.com/QuentinCody/interlinked-cli

Made for: Claude Code, Codex.

Per session 151 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,701 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 3 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00151 $0.03701
Opus 5 $0.00076 $0.01851
Sonnet 5 $0.00030 $0.00740
Haiku 4.5 $0.00015 $0.00370

Measured 2d ago against content hash 44962653fdd3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

interlinked-harness scanned grade D with 3 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 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

| **Destructive fs** | `rm -rf /`, `rm -rf *`, `rm node_modules`, `sudo rm …`, `dd`, `mkfs`, `shred`, `chmod 777` | `rm -rf /tmp/x`, `rm -rf dist/`, `rm -rf .wrangler/cache` |

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

quoted/heredoc/comment text, so *mentioning* `rm -rf /` in an `echo` is allowed while the

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

| **Info-flow / persistence** | env exfil (`env \| curl …`, `printenv \| nc …`), `.npmrc`/`.yarnrc` writes, `nohup curl … &`, `crontab -e`, `systemctl enable`, writes to `/etc/cron.d/`, `*.service` | — |
skills/interlinked-harness/SKILL.md · 192 lines

How it starts

The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.

interlinked-harness — the guard: what blocks you & how to respond

Interlinked runs a local daemon that evaluates every agent tool call before it runs (PreToolUse). It is default-permit with targeted forbid: it allows everything except known-dangerous shapes, which it refuses with an actionable reason and a safer alternative. It is a fast deterministic guardrail, not a security trust boundary (it's local and bypassable) — so the right instinct when blocked is to take the suggested safe path, not to defeat the pattern.

Load this when

  • A tool call was refused: BLOCKED: <reason> / Suggestion: <safer alternative>.
  • You see an [interlinked:<check>] warning (tagged [proven] or [heuristic]).
  • A destructive command, git push --force, protected-file, secret, repo-confinement, or bash-redirect-bypass rule fired.
  • You need to legitimately suppress a check false-positive, or disable a wrong guard rule.

Mental model

  • A hook ships each tool call to the daemon over a Unix socket. The daemon runs an ordered set of phases; the first phase that returns a terminal decision wins.
  • Decisions: block (tool refused, you see the reason), ask (human confirmation — on runners without an ask primitive, like Codex/Copilot/Gemini, ask downgrades to deny), or allow (may still carry non-blocking warnings, or an updated_input rewrite).
  • Built-in rules are regex patterns on the command/tool-input. Use interlinked harness checks for the authoritative current inventory. Patterns are ORed over positive entries; negate:true patterns are exceptions. executed_only masks quoted/heredoc/comment text, so mentioning rm -rf / in an echo is allowed while the bare command blocks. Compound commands (&&, ||, ;, |, newline) are decomposed and each part checked.

Two unrelated things are called "guard". This skill is the PreToolUse guard (the daemon, operated via interlinked harness …). interlinked guard is a separate git pre-commit/pre-push hook that checks staged files against file reservations — see interlinked-coordination.

Read the full file on GitHub · 192 lines

Files

What ships with it

1 file 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.

Changes

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.

  1. 2d ago First seen · 192 lines · 151 tokens per session scan D 44962653fdd3

Subscribe to this mod's changes

interlinked-harness is a skill published in the GitHub repository QuentinCody/interlinked-cli (13 stars, last pushed 14d ago), licensed MIT. It adds 151 tokens to every session and 3,701 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it D with 3 findings (asks for root, recursive force delete, 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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