affaan-m/ECC · error

ck save: invalid JSON on stdin — ${e.message}

Error message

ck save: invalid JSON on stdin — ${e.message}

What it means

The ck save command reads a JSON document from stdin (fd 0); reading or parsing failed — including the explicit 'empty stdin' case — so there is no record to save. The parse error message is embedded.

Source

Thrown at skills/ck/commands/save.mjs:37

import { readFileSync, mkdirSync, writeFileSync } from 'fs';
import { resolve } from 'path';
import {
  readProjects, writeProjects, loadContext, saveContext,
  today, shortId, gitSummary, nativeMemoryDir,
  CURRENT_SESSION,
} from './shared.mjs';

const isInit = process.argv.includes('--init');
const cwd    = process.env.PWD || process.cwd();

// ── Read JSON from stdin ──────────────────────────────────────────────────────
let input;
try {
  const raw = readFileSync(0, 'utf8').trim();
  if (!raw) throw new Error('empty stdin');
  input = JSON.parse(raw);
} catch (e) {
  console.error(`ck save: invalid JSON on stdin — ${e.message}`);
  console.log('Expected schema (save):  {"summary":"...","leftOff":"...","nextSteps":["..."],"decisions":[{"what":"...","why":"..."}],"blockers":["..."]}');
  console.log('Expected schema (--init): {"name":"...","path":"...","description":"...","stack":["..."],"goal":"...","constraints":["..."]}');
  process.exit(1);
}

// ─────────────────────────────────────────────────────────────────────────────
// INIT MODE: first-time project registration
// ─────────────────────────────────────────────────────────────────────────────
if (isInit) {
  const { name, path: projectPath, description, stack, goal, constraints, repo } = input;

  if (!name || !projectPath) {
    console.log('ck init: name and path are required.');
    process.exit(1);
  }

  const projects = readProjects();

View on GitHub (pinned to 06c5e118c4)

Solutions

1. Fix the JSON input/output so it parses; check the cited line/error detail.

When it happens

Trigger: Triggered when save.mjs rejects the current invocation: ck save: invalid JSON on stdin — <value>

Common situations: Occurs while running skills/ck/commands/save.mjs with invalid arguments, missing flags, or a failing external dependency; the guard at skills/ck/commands/save.mjs:37 aborts the command with this message.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of affaan-m/ECC@06c5e118c4 (2026-08-18). Data as JSON: /api/errors/3a787a49c8a827d9. Report an issue: GitHub.