Changelog

5.180.1

(fix): Interactive prompts now fail fast with a non-zero exit code when stdin is not a TTY or CI is set, instead of waiting forever for input (for example, fern init run by an agent without --organization). Cancelling a prompt (Ctrl+C or stdin closing) now also exits non-zero instead of reporting success. CI=false and CI=0 are now treated as not running in CI.

5.180.0

(feat): Add fern whoami [--json]: shows whether the CLI is using a login, a FERN_TOKEN organization token or nothing, and this repo’s guest session (fern generate --guest) with its organization, expiry and claim link. The guest token itself is never printed.

5.179.0

(feat): Add fern claim [--org <name>]: claims the guest session recorded by fern generate --guest with your Fern login (via Venus), points fern.config.json at the organization that now owns the work and forgets the guest session.

(feat): Add fern generate --guest (SDKs and --docs): with no fern login or FERN_TOKEN, the CLI starts a temporary Venus guest session, generates under its guest-<id> organization and prints the claim link and expiry. The session is reused by every run in the same repo (fern/.guest-session, gitignored; credential in ~/.fern/guest-sessions/) and the CLI warns when it is about to expire. A guest can only download: --docs requires --preview, and generators that push to GitHub or publish to a registry are refused up front. --guest --new-session discards the recorded session and starts another one. The login error now mentions --guest.

5.178.0

(feat): Load protobuf (proto) sources from sdk-config.yml into the SDK Config workspace with the same semantics as proto specs in generators.yml: local and git roots, an optional target, ordered overrides, dependencies, localGeneration and fromOpenApi. fern check validates them; SDK Config generation (hosted and --local) rejects them with a clear error until protobuf-to-OpenAPI conversion lands. Upgrades @postman/sdk-config to 0.17.0.

5.177.0

(feat): fern docs dev can now stop itself and report its state in a machine-readable way, so agents and CI no longer have to find and kill the process. All three flags are off by default and apply to the default (Astro) preview server only:

• --timeout <duration> stops the server cleanly this long after it is ready.
• --idle-timeout <duration> stops it after this long with no HTTP requests (the live-reload stream doesn’t count).
• --json writes ready (URL, ports, PID), reload and stopped events to stdout as one JSON object per line; logs go to stderr. Durations accept 30s, 10m or 1h; a plain number means seconds.

(fix): fern docs dev (default Astro server) now exits and returns to the prompt after a clean stop (SIGTERM, SIGHUP, --timeout or --idle-timeout) when run in an interactive terminal. Previously the server shut down but the CLI process stayed alive. It now leaves through the CLI’s normal exit path, after the renderer has exited, and the renderer’s 2s SIGKILL fallback now actually fires if it ignores SIGTERM.

5.176.1

(fix): Fix fern docs dev returning 404 for the sidebar navigation, compiled MDX components and optimized images with the latest docs renderer, which serves them under _fern-files/_nav, _fern-files/_mdx and _fern-files/_img. The preview now sends _-prefixed _fern-files/ paths to the renderer and only sends uploaded files to the local file mirror.

5.176.0

(feat): SDK snippets from sdk-gen are now read from the placeholdersSnippetsUrl link of each artifact, the file whose values carry editable placeholders for the docs “Try it” panel. The SDKs whose snippets were read are left out of the snippetsConfiguration sent to FDR, so FDR no longer fails looking them up in its own snippet store.

5.175.0

(fix): C/C++ library docs: backslashes in generated description: frontmatter are now YAML-escaped (a \M in a Doxygen comment no longer breaks the page or the site), and fern docs md check fails on pages whose frontmatter does not parse instead of silently dropping it.

(feat): C/C++ library docs: when two symbols sanitize to the same filename or URL (s_dup vs __s_dup, S_CASE vs s_case), the public name now always gets the plain URL and _-prefixed names get the -2 suffix, independent of source order. New opt-in config.slug-style: hyphenated on lang: cpp libraries keeps word boundaries in URLs (/functions/doca-pcc-dev-get-port-counter-id).

(feat): fern docs md generate --keep-logs writes each library parser’s logs to <fern folder>/.fern/library-docs-logs/<library>.log instead of a temporary file that is removed when the command exits.