linear-webhooks

Tools for managing webhooks in Linear, the issue-tracking service. Webhooks send notifications to another system when selected events happen in Linear.

In plain words
What is it for?
Use it to create, view, update, delete, and test Linear webhooks, subscribe to issue events, and verify locally received requests.
Why use it?
They remove the need to set up and manage event connections manually, including checking incoming events and updating signing secrets.

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/nesszer/linear-cli/linear-webhooks
Any agent
npx skills add nesszer/linear-cli --skill linear-webhooks
Clone the repo
git clone --depth 1 https://github.com/nesszer/linear-cli

Made for: Claude Code, Codex.

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 340 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 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 $0.00026 $0.00340
Opus 5 $0.00013 $0.00170
Sonnet 5 $0.00005 $0.00068
Haiku 4.5 $0.00003 $0.00034

Measured 2d ago against content hash dad7a5355c22, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

linear-webhooks 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 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.

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.

skills/linear-webhooks/SKILL.md · 57 lines

What it actually says

Webhooks

# List all webhooks
linear-cli wh list

# Create a webhook
linear-cli wh create https://example.com/hook --events Issue

# Get webhook details
linear-cli wh get WEBHOOK_ID

# Update a webhook
linear-cli wh update WEBHOOK_ID --url https://new-url.com

# Delete a webhook
linear-cli wh delete WEBHOOK_ID --force

# Rotate signing secret
linear-cli wh rotate-secret WEBHOOK_ID

# Listen for events locally (dev/testing)
linear-cli wh listen --port 9000
linear-cli wh listen --port 9000 --secret SIGNING_SECRET

Subcommands

Command Purpose
list List all webhooks
get View webhook details
create Create webhook
update Update webhook
delete Delete webhook
rotate-secret Rotate signing secret
listen Local event listener with HMAC verification

Flags

Flag Purpose
--events TYPE Event types to subscribe
--port N Local listener port
--secret KEY HMAC signing secret
--output json JSON output

Exit Codes

0=Success, 1=Error, 2=Not found, 3=Auth error

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 · 57 lines · 26 tokens per session scan A dad7a5355c22

Subscribe to this mod's changes

linear-webhooks is a skill published in the GitHub repository nesszer/linear-cli (133 stars, last pushed 1mo ago), licensed MIT. It adds 26 tokens to every session and 340 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 2026-08-30.

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