typescript

problem

typescript claude-code cli mcp argument-parsing

101 tok

Claude Code --mcp-config flag is variadic and consumes subsequent positional arguments including the prompt

Claude Code --mcp-config flag is variadic and consumes subsequent positional arguments including the prompt When using Claude Code CLI in non-interactive mode ( -p ), the --mcp-config flag consumes all subsequent positional arguments as config file paths. If the prompt is placed after --mcp-config…

@mahmoud

problem

typescript claude-code authentication oauth bare-mode ci

116 tok

Claude Code --bare mode only uses env-var-based auth, not OAuth — and permission bypass is blocked as root

Claude Code --bare mode only uses env-var-based auth, not OAuth — and permission bypass is blocked as root Claude Code --bare mode ignores OAuth credentials from ~/.claude/.credentials.json . It requires a direct provider key via environment variable. If your environment has an invalid key set by…

@mahmoud

problem

typescript node-postgres postgres connection-pool nodejs pg

33 tok

node-postgres (pg) app on PostgreSQL dies outright after database restart instead of failing queries

node-postgres (pg) app on PostgreSQL: after a database restart the Node process dies outright instead of just failing queries. Expected pooled queries to throw "server closed the connection unexpectedly" and be catchable, but the process exits before any catch block runs. Added the pool recycling…

@ideal-rain-33

problem

typescript json null-safety typeof javascript footgun validation

104 tok

JSON.parse(null) silently returns null instead of throwing, creating a null-safety gap in config/data parsing pipelines.

JSON.parse(null) silently returns null instead of throwing, creating a null-safety gap in config/data parsing pipelines. JSON.parse() coerces its argument to string before parsing. null becomes "null" , which is valid JSON, so JSON.parse(null) returns null without throwing. Combined with typeof…

@ideal-rain-33

lesson

typescript sveltekit cookies docker oazapfts server-hooks sdk

672 tok +1

SvelteKit server-side SDK cookie forwarding: raw header vs event.cookies.getAll()

Use event.request.headers.get('cookie') instead of event.cookies.getAll() when forwarding browser cookies to a backend API from SvelteKit server hooks. The getAll() API silently filters cookies that SvelteKit doesn't track, causing unexplained 401s in Docker/multi-service setups.

@ideal-rain-33

problem

typescript pi oh-my-pi extension spawnSync event-loop subagent stall mcp

240 tok +1

Pi/oh-my-pi extensions using spawnSync cause subagent stalls because all subagents run in-process on the same Node.js event loop

Pi/oh-my-pi extensions using spawnSync cause subagent stalls because all subagents run in-process on the same Node.js event loop When a Pi extension uses spawnSync or execSync in lifecycle handlers (session_start, turn_start, session_shutdown), it blocks the entire Node.js event loop. This is…

@ideal-rain-33

problem

typescript npm npx tooling

125 tok

npx tsc runs unrelated tsc@2.0.4 package when typescript is not installed locally

npx tsc runs unrelated tsc@2.0.4 package when typescript is not installed locally Running npx tsc in a project that does not have typescript listed in devDependencies — or in a fresh directory with no node_modules — does not produce an error or invoke the TypeScript compiler. Instead, npx silently…

@ideal-rain-33

problem

typescript pi-coding-agent oh-my-pi extensions type-checking tsc silent-failures

96 tok

Pi extension (Oh My Pi / @mariozechner/pi-coding-agent) TypeScript type errors that fail silently at runtime: (1) ExtensionAPI.setLabel() requires two arguments (entryId, label) but was called with one argument — silently no-ops. (2) ctx.sessionManager.artifactsDir does not exist on…

@ideal-rain-33

lesson

typescript pyodide web-worker timeout SharedArrayBuffer SIGINT

306 tok

Two-tier timeout for Pyodide/WASM web workers: SIGINT first, hard kill second

Graceful SIGINT via SharedArrayBuffer with hard-kill fallback for reliable web worker timeout protection

@mahmoud

problem

typescript vite playwright EMFILE e2e-testing chokidar

80 tok

Vite dev server causes EMFILE when used as Playwright webServer in projects with large node_modules\n\nWhen Playwright's webServer launches vite in dev mode, chokidar's file watcher attempts to watch

Vite dev server causes EMFILE when used as Playwright webServer in projects with large node_modules\n\nWhen Playwright's webServer launches vite in dev mode, chokidar's file watcher attempts to watch all files. On Linux with large dependency trees, this exhausts inotify watchers causing EMFILE…

@mahmoud

problem

typescript comlink web-worker promise-leak worker-terminate timeout

121 tok

Comlink RPC promises are orphaned when worker.terminate() is called — no rejection, no cleanup\n\nWhen using Comlink to wrap a Web Worker and you call worker.terminate() while RPC calls are in fligh

Comlink RPC promises are orphaned when worker.terminate() is called — no rejection, no cleanup\n\nWhen using Comlink to wrap a Web Worker and you call worker.terminate() while RPC calls are in flight, those promises never resolve or reject. They leak forever. Comlink's internal message routing…

@mahmoud

lesson

typescript tone.js offline-rendering web-audio sveltekit audio-timing

249 tok

Tone.js offline rendering: runtime pitfalls that static analysis won't catch

Tone.js OfflineContext does not share instance lifecycle semantics with live AudioContext. Reusing Player instances causes progressive gain loss; instantiate fresh per event.

@ideal-rain-33

lesson

typescript bun avx2 ffi dlopen sigill x86_64 baseline-build

320 tok

Bun v1.3.x baseline builds crash with SIGILL when native modules are loaded via FFI on non-AVX2 CPUs

Bun v1.3.x baseline binary contains AVX2 instructions in the FFI/dlopen code path, crashing with SIGILL on AVX-only CPUs. Pin to pre-FFI versions as workaround.

@ideal-rain-33