Skip to main content 홈 크리에이터 jeremylongshore tons-of-skills-marketplace linear-security-basics
linear-security-basics Secure API key management, OAuth best practices, and webhook
verification for Linear integrations.
Trigger: "linear security", "linear API key security",
"linear OAuth", "secure linear", "linear webhook verification",
"linear secrets management", "linear token refresh".
설치로 이동 Skills Marketplace 커뮤니티가 만든 AI 스킬을 발견하고 탐색하세요.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
직접 명령은 검토 Prompt를 거치지 않습니다. 실행하기 전에 소스를 확인하세요.
npx skills add https://github.com/jeremylongshore/tons-of-skills-marketplace --skill linear-security-basics명령은 한 줄로 유지됩니다. 복사하기 전에 가로로 스크롤해 전체 내용을 확인하세요.
로컬 사본을 원하시나요? SkillsMP에서 현재 제공할 수 있는 파일을 다운로드하세요.
Zip 다운로드 다운로드 중... 이 저장소의 다른 Skills langchain-deploy-integration Deploy a LangChain 1.0 / LangGraph 1.0 app to Cloud Run, Vercel, or LangServe correctly — with timeouts sized for chain length, cold-start mitigation, SSE anti-buffering headers, and Secret Manager over .env. Use when prepping a first production deploy, debugging a stream that hangs behind a proxy, or diagnosing p99 latency spikes. Trigger with "langchain deploy", "langchain cloud run", "langchain vercel python", "langchain langserve", or "langchain docker".
langchain-langgraph-agents Build a correct LangGraph 1.0 ReAct agent with create_react_agent — typed tools, error propagation, recursion caps, and stop conditions that actually stop. Use when writing a first tool-calling agent, migrating from AgentExecutor or initialize_agent, or diagnosing an agent that loops on vague prompts. Trigger with "langgraph agent", "create_react_agent", "langgraph tool calling", "AgentExecutor migration", or "agent loop cost".
langchain-langgraph-human-in-loop Build LangGraph 1.0 human-in-the-loop approval flows with interrupt_before /
interrupt_after and Command(resume=...) — JSON-serializable state, clean
resume semantics, and UI wiring for approval decisions. Use when adding an
approval gate before an expensive tool call, wiring a Slack/web UI for agent
approvals, or debugging a graph that crashes on interrupt.
Trigger with "langgraph human in loop", "langgraph interrupt_before",
"langgraph approval flow", "Command resume", "langgraph HITL".
jeremylongshore
jeremylongshore/tons-of-skills-marketplace
GitHub 저장소 열기 name linear-security-basics description Secure API key management, OAuth best practices, and webhook
verification for Linear integrations.
Trigger: "linear security", "linear API key security",
"linear OAuth", "secure linear", "linear webhook verification",
"linear secrets management", "linear token refresh".
allowed-tools Read, Write, Edit, Grep version 1.12.0 license MIT author Jeremy Longshore <jeremy@intentsolutions.io> tags ["saas","linear","api","security","authentication"] compatibility Designed for Claude Code
Linear Security Basics
Overview
Secure authentication patterns for Linear integrations: API key management, OAuth 2.0 with PKCE, token refresh (mandatory for new apps after Oct 2025), webhook HMAC-SHA256 signature verification, and secret rotation.
Prerequisites
Linear account with API access
Understanding of environment variables and secret management
Familiarity with OAuth 2.0 and HMAC concepts
Instructions
Step 1: Secure API Key Storage
import { LinearClient } from "@linear/sdk" ;
const client = new LinearClient ({
apiKey : process.env .LINEAR_API_KEY !,
});
Environment setup:
LINEAR_API_KEY=lin_api_xxxxxxxxxxxxxxxxxxxxxxxxxxxx
LINEAR_WEBHOOK_SECRET=whsec_xxxxxxxxxxxx
.env
.env .*
!.env.example
LINEAR_API_KEY=lin_api_your_key_here
LINEAR_WEBHOOK_SECRET=your_webhook_secret_here
Startup validation:
function validateConfig (void {
const key = process.env .LINEAR_API_KEY ;
if (!key) throw new Error ("LINEAR_API_KEY is required" );
if (!key.startsWith ("lin_api_"
throw
new
Error
"LINEAR_API_KEY has invalid format"
if
length
30
throw
new
Error
"LINEAR_API_KEY appears truncated"
validateConfig
Step 2: OAuth 2.0 with PKCE import express from "express" ;
import crypto from "crypto" ;
const app = express ();
const OAUTH = {
clientId : process.env .LINEAR_CLIENT_ID !,
clientSecret : process.env .LINEAR_CLIENT_SECRET !,
redirectUri : process.env .LINEAR_REDIRECT_URI !,
scopes : ["read" , "write" , "issues:create" ],
};
function generatePKCE (const verifier = crypto.randomBytes (32 ).toString ("base64url" );
const challenge = crypto.createHash ("sha256" ).update (verifier).digest ("base64url" );
return { verifier, challenge };
}
app.get ("/auth/linear" , (req, res ) => {
const state = crypto.randomBytes (16 ).toString ("hex" );
const { verifier, challenge } = generatePKCE ();
req.session !.oauthState = state;
req.session !.codeVerifier = verifier;
const url = new URL ("https://linear.app/oauth/authorize" );
url.searchParams .set ("client_id" , OAUTH .clientId );
url.searchParams .set ("redirect_uri" , OAUTH .redirectUri );
url.searchParams .set ("response_type" , "code" );
url.searchParams .set ("scope" , OAUTH .scopes .join ("," ));
url.searchParams .set ("state" , state);
url.searchParams .set ("code_challenge" , challenge);
url.searchParams .set ("code_challenge_method" , "S256" );
res.redirect (url.toString ());
});
app.get ("/auth/linear/callback" , async (req, res) => {
const { code, state } = req.query ;
if (state !== req.session !.oauthState ) {
return res.status (400 ).json ({ error : "Invalid state parameter" });
}
const response = await fetch ("https://api.linear.app/oauth/token" , {
method : "POST" ,
headers : { "Content-Type" : "application/x-www-form-urlencoded" },
body : new URLSearchParams ({
grant_type : "authorization_code" ,
code : code as string ,
client_id : OAUTH .clientId ,
client_secret : OAUTH .clientSecret ,
redirect_uri : OAUTH .redirectUri ,
code_verifier : req.session !.codeVerifier ,
}),
});
const tokens = await response.json ();
await storeTokens (req.user !.id , {
accessToken : encrypt (tokens.access_token ),
refreshToken : encrypt (tokens.refresh_token ),
expiresAt : new Date (Date .now () + tokens.expires_in * 1000 ),
});
res.redirect ("/dashboard" );
});
Step 3: Token Refresh As of Oct 2025, all new Linear OAuth apps issue refresh tokens. Existing apps must migrate by April 2026.
async function getValidToken (userId : string Promise <string > {
const stored = await getStoredTokens (userId);
if (stored.expiresAt .getTime () - Date .now () < 5 * 60 * 1000 ) {
const response = await fetch ("https://api.linear.app/oauth/token" , {
method : "POST" ,
headers : { "Content-Type" : "application/x-www-form-urlencoded" },
body : new URLSearchParams ({
grant_type : "refresh_token" ,
refresh_token : decrypt (stored.refreshToken ),
client_id : process.env .LINEAR_CLIENT_ID !,
client_secret : process.env .LINEAR_CLIENT_SECRET !,
}),
});
if (!response.ok ) throw new Error (`Token refresh failed: ${response.status} ` );
const tokens = await response.json ();
await storeTokens (userId, {
accessToken : encrypt (tokens.access_token ),
refreshToken : encrypt (tokens.refresh_token ),
expiresAt : new Date (Date .now () + tokens.expires_in * 1000 ),
});
return tokens.access_token ;
}
return decrypt (stored.accessToken );
}
Step 4: Webhook Signature Verification Linear signs every webhook with HMAC-SHA256 using the webhook's signing secret. The signature is in the Linear-Signature header.
import crypto from "crypto" ;
function verifyWebhookSignature (
rawBody : string ,
signature : string ,
secret : string
): boolean {
const expected = crypto
.createHmac ("sha256" , secret)
.update (rawBody)
.digest ("hex" );
try {
return crypto.timingSafeEqual (
Buffer .from (signature),
Buffer .from (expected)
);
} catch {
return false ;
}
}
app.post ("/webhooks/linear" , express.raw ({ type : "*/*" }), (req, res ) => {
const signature = req.headers ["linear-signature" ] as string ;
const rawBody = req.body .toString ();
if (!verifyWebhookSignature (rawBody, signature, process.env .LINEAR_WEBHOOK_SECRET !)) {
return res.status (401 ).json ({ error : "Invalid signature" });
}
const event = JSON .parse (rawBody);
const age = Date .now () - event.webhookTimestamp ;
if (age > 60000 ) {
return res.status (400 ).json ({ error : "Webhook too old" });
}
processEvent (event).catch (console .error );
res.json ({ received : true });
});
Step 5: Secret Rotation
const apiKeys = [
process.env .LINEAR_API_KEY_NEW ,
process.env .LINEAR_API_KEY_OLD ,
].filter (Boolean ) as string [];
async function getWorkingClient (Promise <LinearClient > {
for (const apiKey of apiKeys) {
try {
const client = new LinearClient ({ apiKey });
await client.viewer ;
return client;
} catch {
continue ;
}
}
throw new Error ("No valid Linear API key found" );
}
Security Checklist
Error Handling Error Cause Solution Invalid signatureWebhook secret mismatch Verify LINEAR_WEBHOOK_SECRET in Linear Settings > API > Webhooks invalid_grantRefresh token expired/revoked Re-initiate full OAuth flow Invalid scopeApp not authorized for scope Request only scopes your app needs Authentication requiredToken expired, refresh failed Trigger re-authentication
Examples
Test Webhook Signature Locally import crypto from "crypto" ;
const secret = "test-signing-secret" ;
const payload = JSON .stringify ({
action : "create" ,
type : "Issue" ,
data : { id : "test" , title : "Test" },
webhookTimestamp : Date .now (),
});
const sig = crypto.createHmac ("sha256" , secret).update (payload).digest ("hex" );
console .log (`Signature: ${sig} ` );
console .log (`Valid: ${verifyWebhookSignature(payload, sig, secret)} ` );
Resources 