Addresses #5958.
Adds `changelogPath` to `PiManifest`. Safe package-relative changelog
resolution, with `CHANGELOG.md` fallback, and carries it through
`PathMetadata`/`SourceInfo`.
Added extension changelog handling like Pi’s own changelog.
If the package exposes `pi.changelogPath` or has `CHANGELOG.md`, Pi
stores the last seen package version in settings. On each fresh
interactive launch, we compare the stored version to the installed
package version. Then parses the changelog entries in between, shows an
Extension Updates section, then marks the current version as seen. The
first time an extension is seen, its version is recorded without showing
a changelog, same as Pi's own on a fresh install. `collapseChangelog`
condenses this to one line per package.
Any update that bumps the extension's version shows this on the next
launch, e.g.:
```bash
pi update --extensions
pi update --all
pi update <extension-source>
pi update --extension <extension-source>
pi update --self --extensions
pi update pi --extensions
pi update self --extensions
```
<img width="798" height="626" alt="Screenshot 2026-08-28 at 16 34 15"
src="https://github.com/user-attachments/assets/c882f01c-94b9-4857-b9b7-243d88c0d437"
/>
fix(coding-agent): start when a configured package fails to install
A package in settings.json that could not be installed (registry
unreachable, package missing, failing git prepare step) crashed startup
with an uncaught rejection and a raw Node stack.
Resolving packages now catches the install failure, skips that package
the same way offline mode does, and reports it as an extension warning:
Warning: Extension package "npm:foo": failed to install (...).
Run "pi remove npm:foo" to remove it from settings.json.
Project packages point at `pi remove <source> --local`. `-e` sources
say to check the source instead. Pi tries the install again on the next
start or /reload.
--help and --list-models now print runtime diagnostics, so the warning
shows there too. pi config prints it as well. pi install and
pi update --extensions still fail with a non-zero exit.
closes#11088
Built-in extensions (mcp, llama.cpp, codemode, tool-search) are now extension resources like files: the package manager resolves them as builtin:<name>, the extensions setting disables them with -builtin:<name> (per project too), pi config lists them, and --no-extensions turns them off unless loaded with -e builtin:<name>. They load after project trust is resolved and after file and package extensions.
Built-in extensions and tools are named builtin:<name> in errors, diagnostics, RPC source info, and bug reports.
Use hosted-git-info library for robust parsing of SSH URLs (git@host:path
and ssh://) in addition to HTTPS. SSH and HTTPS URLs for the same repo
are now properly deduplicated.
- Rewrote README intro to emphasize extensibility and pi packages
- Added Pi Packages section to README
- Created docs/packages.md covering install, sources, manifest, filtering
- Created docs/prompt-templates.md covering format and arguments
- Created docs/themes.md with overview linking to theme.md
