jaymd96-psclaude 0.2.3

Single-shot Claude Code CLI wrapper with workspace isolation

psclaude

Programmatic single-shot interface to Claude Code CLI with workspace isolation.

psclaude creates an isolated temporary workspace per session, stages your extensions (skills, CLAUDE.md, plugins), and provides a clean Python API for sending prompts and receiving either flat text or structured file output. Each invocation is self-contained — no shared state, no side effects on your project.

Private alpha — API surface may change before 1.0.

Prerequisites

• Python 3.11+
• Claude Code CLI installed and authenticated

Install

pip install jaymd96-psclaude

Quick start

Text mode

Send a prompt, get a text response.

from psclaude import PsClaude

client = PsClaude()
resp = client.send("Explain what a monad is in one sentence.")
print(resp.text)
client.cleanup()

Structured mode

Claude generates files into an isolated output directory and returns a JSON manifest describing them.

from psclaude import PsClaude, OutputMode

client = PsClaude(
    output_mode=OutputMode.STRUCTURED,
    skills=["./skills/python-style.md"],
    claude_md="./CLAUDE.md",
)

resp = client.send("Create a FastAPI hello-world project")

for f in resp:
    print(f"{f.filename}: {f.description}")
    print(f.content)

# Files persist in client.output_dir until cleanup
client.cleanup()

Functional API

run_claude handles setup and teardown automatically.

from psclaude import run_claude

resp = run_claude(
    lambda c: c.send("Summarise the CSV files"),
    input_dir="./data",
)
print(resp.text)
# Workspace already cleaned up

Input directory

Provide a read-only reference directory that Claude can read from but never modify.

client = PsClaude(input_dir="./data")
resp = client.send("Analyse the logs")

# Override per-send
resp = client.send("Now look at these", input_dir="./other-data")
client.cleanup()

Extensions

Load skills, CLAUDE.md, and plugins to configure Claude's behaviour.

client = PsClaude(
    skills=["./skills/review.md", "./skills/api-guide.md"],
    claude_md="./project-claude.md",
    plugin_dirs=["./my-plugin"],
    model="sonnet",
    timeout=180,
)

API reference

PsClaude(**kwargs)

Parameter	Type	Default	Description
output_mode	OutputMode	TEXT	TEXT for flat text, STRUCTURED for file generation
skills	Sequence[Path]	()	Skill markdown files — copied into workspace .claude/skills/
claude_md	Path | None	None	CLAUDE.md file — copied to workspace root
plugin_dirs	Sequence[Path]	()	Plugin directories — passed via --plugin-dir
input_dir	Path | None	None	Read-only reference directory — symlinked as input/
model	str | None	None	Model override (e.g. "sonnet", "opus")
max_tokens	int | None	None	Max response tokens
timeout	int	120	Subprocess timeout in seconds
allowed_tools	Sequence[str] | None	auto	Tool allowlist (defaults to Read,Write,Edit,Bash in structured mode)
permission_mode	str | None	auto	CLI permission mode (defaults to bypassPermissions in structured mode)

client.send(prompt, *, system=None, input_dir=None)

Send a single-shot prompt. Returns TextResponse or StructuredResponse based on output mode.

• system — optional system prompt
• input_dir — override the default input directory for this call only

client.cleanup()

Remove the workspace directory and all generated files. The original input directory is never touched. Safe to call multiple times.

run_claude(fn, **kwargs)

Functional wrapper. Creates a PsClaude with the given kwargs, calls fn(client), cleans up in a finally block, and returns whatever fn returns.

Properties

Property	Description
client.workspace	Path to the temporary workspace
client.output_dir	Path to the structured output directory
client.input_dir	Path to the input symlink in the workspace
client.output_mode	The configured OutputMode

Response types

TextResponse

Field	Type	Description
.text	str	Claude's response text
.ok	bool	True if exit code is 0
.exit_code	int	CLI process exit code
.cost_usd	float | None	API cost in USD
.input_tokens	int | None	Tokens consumed
.output_tokens	int | None	Tokens generated
.duration_ms	int | None	Wall-clock duration

StructuredResponse

Same cost/status fields as TextResponse, plus:

Field	Type	Description
.files	tuple[FileEntry, ...]	Generated files
resp["filename"]	FileEntry	Lookup by name
len(resp)	int	Number of files
for f in resp	iteration	Iterate over files

FileEntry

Field	Type	Description
.filename	str	File name (no path)
.description	str	One-line summary from Claude
.path	Path	Absolute path to the file on disk
.content	str	File contents (read on access)

Architecture

PsClaude.__init__()
  |
  +-- detect()              # Find and validate Claude Code CLI (cached)
  +-- mkdtemp(prefix="claude_")
  |     +-- CLAUDE.md       # Copied from claude_md param
  |     +-- .claude/skills/ # Copied from skills param
  |     +-- input/          # Symlink to input_dir (read-only)
  |     +-- output/         # Structured mode file output
  |
  +-- send(prompt)
  |     +-- _build_cmd()    # Assembles: claude -p <prompt> --output-format json ...
  |     +-- subprocess.run() with cwd=workspace
  |     +-- _parse_json_output() -> text + metadata
  |     +-- TextResponse | StructuredResponse
  |
  +-- cleanup()             # shutil.rmtree(workspace), input_dir untouched

Development

hatch env create
hatch run test          # Run tests
hatch run cov           # Tests with coverage
hatch run lint:check    # Ruff lint
hatch run lint:fmt      # Ruff format
hatch build             # Build sdist + wheel

License

MIT