Helps the agent find relevant code faster in opencode tui.

Signed-off-by: Christian Stewart <christian@aperture.us>

This was an unintentional regression with opentui similar to #3777

Before "bun dev" would start with the project dir set to ./

...but now it's ./packages/opencode

This can cause some confusion as there is an AGENTS.md in the repo root.

When `Installation.isLocal()` returns true (dev mode), the default directory is
now: ```typescript path.resolve(process.cwd(), "../..") ```

This means when running `bun dev` from the root with `--cwd packages/opencode`,
the working directory will be correctly set to the repo root (`./`) instead of
`./packages/opencode`, ensuring the root AGENTS.md file is properly accessible.

Fixes: #3922

Signed-off-by: Christian Stewart <christian@aperture.us>

Uses #3778

Signed-off-by: Christian Stewart <christian@aperture.us>

When reading image files, the Read tool now displays file size, dimensions (width x height), and format information. Implements binary parsing for PNG, JPEG, GIF, and WebP headers to extract dimensions without external dependencies.

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>

After working with the codebase using opencode a bit:

- Add guidance on regenerating SDK after schema changes
- Document type predicate pattern for filtering discriminated unions
- Discourage use of 'as' casts when TypeScript's type narrowing fails
- Add guidance to run prettier after changing code with ./script/format.ts
- .gitignore: exclude bun-build files

Significantly reduces errors in the output in my experience.

Signed-off-by: Christian Stewart <christian@aperture.us>

opencode session export [sessionID]

export session transcript to file

Positionals:
  sessionID  session id to export

Options:
  -o, --output      output file path
  -f, --format      output format
  [string] [choices: "markdown", "json"] [default: "markdown"]

Fixes: #5426

Signed-off-by: Christian Stewart <christian@aperture.us>

This is useful when:

1. Run opencode run with a script.
2. Forward stdout and stderr to script output so user can see whats happening.
3. Parse the [session:id] line in the script.
4. Use opencode session export to export to json later.

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>

If the prompt is too long it can break when passed on the command line.

We have -f which attaches files but we need a way to specify the prompt from a
file, so add --prompt-file to pass a path to the message file to load.

Signed-off-by: Christian Stewart <christian@aperture.us>

Move truncated tool output from global ~/.local/share/opencode/tool-output
to project-local .opencode/tool-output directory. This keeps tool output
alongside the project it was generated for.

- Change Truncate.DIR/GLOB constants to dir()/glob() functions
- Remove external_directory permissions for truncate path (now internal)
- Update tests to use Instance context

Signed-off-by: Christian Stewart <christian@aperture.us>

Signed-off-by: Christian Stewart <christian@aperture.us>