SymPy-Calculate
A third-party DeepSeek Harness agent preset based on minimal. It adds one
stateless tool, sympy_calculate, which runs a complete Python script in a
fresh process against a local SymPy development checkout.
Security: sympy_calculate executes arbitrary Python with the current
user's permissions and inherited environment. It is not sandboxed. Enable
it only in sessions whose model and permission policy you trust.
Highlights
- Each call is bounded by a 120-second timeout; stdout and stderr are each capped at 2,000,000 characters.
Requirements
Among shipped profiles, install into web only. The preset needs the
agent-preset-registry service supplied by the web bundle; in headless,
sdk, sdk-minimal, or acp it will not be selectable. A custom profile
can use the preset if it includes the agent-preset-registry service.
Set up SymPy
The tool uses this checkout root and interpreter candidates:
~/sympy-dev/sympy
~/sympy-dev/sympy/venv/bin/python
~/sympy-dev/sympy/venv/bin/python3
On Ubuntu, install the venv tooling first if it is missing:
sudo apt install -y python3-venv python3-pip
Then create the checkout:
mkdir -p ~/sympy-dev
git clone https://github.com/sympy/sympy.git ~/sympy-dev/sympy
# Optional: use the exact tested SymPy revision.
git -C ~/sympy-dev/sympy checkout 6aabf6ac9eddd1c5141ff9a3a35dcb53a7b02228
python3 -m venv ~/sympy-dev/sympy/venv
~/sympy-dev/sympy/venv/bin/python -m pip install -e ~/sympy-dev/sympy
echo 'venv/' >> ~/sympy-dev/sympy/.git/info/exclude
The editable install also installs SymPy's external mpmath dependency.
Confirm the checkout before installing the plugin:
~/sympy-dev/sympy/venv/bin/python -c "import sympy; print(sympy.__version__)"
To use another checkout or interpreter, set both variables in the
environment that starts DeepSeek Harness:
| Variable | Default | Meaning |
|---|
SYMPY_ROOT | ~/sympy-dev/sympy | Checkout root; also the PYTHONPATH |
SYMPY_PYTHON | <root>/venv/bin/python, then python3 | Python interpreter |
Install
Install
@e_11350613/dsh-sympy-calculate
from npm into the web profile. If dsh is already on your PATH, replace
the npx --yes @deepseek-ai/dsh@0.2.1-rc.2 prefix with dsh.
npx --yes @deepseek-ai/dsh@0.2.1-rc.2 plugin --profile web add \
@e_11350613/dsh-sympy-calculate@1.0.6
Alternative installs: GitHub tarball, GitHub shorthand, or a DeepSeek Harness source checkout
HTTPS tarball, if you prefer to install directly from GitHub:
npx --yes @deepseek-ai/dsh@0.2.1-rc.2 plugin --profile web add \
https://codeload.github.com/11350613/SymPy-Calculate/tar.gz/v1.0.6
Git shorthand, when GitHub SSH access is already configured:
npx --yes @deepseek-ai/dsh@0.2.1-rc.2 plugin --profile web add \
github:11350613/SymPy-Calculate#v1.0.6
From a DeepSeek Harness source checkout, use pnpm dsh:
pnpm dsh plugin --profile web add \
@e_11350613/dsh-sympy-calculate@1.0.6
Start or restart the web profile, then select SymPy Calculate when
creating a session.
Verify
Check that the bundle and preset are in the composed config:
npx --yes @deepseek-ai/dsh@0.2.1-rc.2 --profile web --dump-config \
| grep "SymPy Calculate"
Then start the UI and confirm that SymPy Calculate appears in the preset
picker without an error marker:
npx --yes @deepseek-ai/dsh@0.2.1-rc.2 --profile web --no-open
Usage
sympy_calculate expects one complete script:
{
"code": "from sympy import *\n\nx = symbols('x')\nprint(integrate(x**2 / (1 + x**4), (x, -oo, oo)))\n"
}
Output:
sqrt(2)*pi/2
Because every call starts a fresh interpreter and pays the SymPy import
cost, batch related computations into one script instead of making many
small calls. stdout and stderr are combined; a non-zero exit is returned as
a tool error.
Troubleshooting
| Symptom | Fix |
|---|
sympy_calculate: no Python interpreter under ... | Run the SymPy setup above, or export SYMPY_ROOT / SYMPY_PYTHON before starting dsh. |
| Remove the plugin | npx --yes @deepseek-ai/dsh@0.2.1-rc.2 plugin --profile web remove @e_11350613/dsh-sympy-calculate |
Removal fails with ERR_PNPM_MISSING_TARBALL_INTEGRITY | Run cd ~/.dsh/profiles/web && pnpm remove @e_11350613/dsh-sympy-calculate --config.trust-lockfile=true (skips lockfile verification for this removal), then restart DSH. |
Tested on
Issues
Bug reports and feature requests: https://github.com/11350613/SymPy-Calculate/issues
License
MIT. See LICENSE.
