See what your coding agent actually did.
Open a local session trace from Codex, Claude Code, or Antigravity and inspect the full trajectory — instructions, messages, reasoning, tool calls, results, and captured state.
Codex
~/.codex/sessions/*.jsonl
Typed rollout records with encrypted reasoning payloads and readable summaries.
Claude Code
~/.claude/projects/<project>/*.jsonl
UUID-linked messages with plaintext thinking blocks and file-history snapshots.
Antigravity
brain/<conv>/.system_generated/logs/transcript_full.jsonl
Planner step records with thinking, tool calls, and sequential results.
Choose a .jsonl or .json file — the agent format is detected automatically
Nothing leaves your browser. The file is read locally by this page — it is never uploaded or stored, and this page makes no network requests at all. Reloading discards the trace. Full instruction and tool-output bodies are shown, so review before sharing screenshots.
Traces can contain secrets and private data. This viewer deliberately shows complete instruction bodies and tool output. The file stays in this browser tab.