#Structured File Logs

Zephyr build integrations now support structured, file-based logging for every build run. When enabled, logs are written to disk in addition to the terminal, making it easier to debug build issues locally and to store artifacts from CI.

#Quick start

• Enable logging for a single command:

ZEPHYR_LOG_TO_FILE=true pnpm build

• Choose TOON encoding instead of JSON:

ZEPHYR_LOG_TO_FILE=true ZEPHYR_LOG_FORMAT=toon pnpm build

• Override the default log directory:

ZEPHYR_LOG_TO_FILE=true ZEPHYR_LOG_PATH=/tmp/zephyr-logs pnpm build

#Where logs are stored

• Default path: ~/.zephyr/logs/ (override with ZEPHYR_LOG_PATH)
• Per-run folders: Each command creates run-<timestamp>/ so logs from different runs never collide
• File naming: Logs are split by intent to keep them targeted:
  • info.log, warn.log, error.log
  • action-<action>.log (actions use the Zephyr log action names; colons become hyphens)
  • debug-<context>.log for zephyr:* debug namespaces (captured even if DEBUG is not set)
• Summary: When the CLI writes run metadata, it is saved to summary.json with timestamps, duration, build ID, and any reported counts.

#Example layout

~/.zephyr/logs/run-2024-06-14T18-22-05/
  info.log
  warn.log
  error.log
  action-build.log
  debug-git.log
  summary.json

#Log formats

• JSON (default): One JSON object per line with level, message, timestamp, action, and any structured payloads.
• TOON: Set ZEPHYR_LOG_FORMAT=toon to emit TOON encoded entries for downstream tooling that prefers the format.

#Structured payload extraction

• When a log line contains valid JSON (for example, API responses), the builder separates the text from the parsed payload:
  • message keeps the human-readable text
  • payload contains the parsed JSON object or array
• ANSI color codes are stripped before writing, so files stay clean for parsers and artifact viewers.

#CI recommendations

• Turn on file logging for build steps where you already capture artifacts: ZEPHYR_LOG_TO_FILE=1
• Set ZEPHYR_LOG_PATH to a workspace-relative folder (e.g., ./artifacts/zephyr-logs) so your pipeline can zip and upload it
• Keep DEBUG off if you do not want verbose console output—debug namespaced logs are still captured on disk when file logging is enabled

With file logging enabled, every Zephyr build run produces durable, structured logs you can inspect locally, attach to bug reports, or feed into your log processing pipeline.