[timkpaine]

What this adds

backend=symphony_rsa, a Symphony preset that authenticates with an RSA private key.

export SYMPHONY_HOST=... SYMPHONY_BOT_USERNAME=... SYMPHONY_BOT_PRIVATE_KEY_PATH=...
csp-bot-start +gateway=bot '+backend=[symphony_rsa]'

Why

The existing symphony preset authenticates with a certificate, so every bot using an RSA key has to hand-write an override. docs/wiki/Backends.md currently documents exactly that workaround.

RSA is what symphony-bdk configuration files use, and it is what Symphony's Developer Certification sandbox issues — the bundle it hands over contains a config.json pointing at a *-private.pem, with no certificate at all. A preset seems better than asking everyone starting from that bundle to write the override themselves.

The certificate preset is untouched, so nothing changes for existing users. Like it, the RSA preset takes a path rather than key content, keeping long-lived key material out of the process environment.

Verification

Run against a Developer Certification sandbox bot on develop2.symphony.com:

Starting csp_gateway version 3.0.0 / csp_bot version 2.0.2
Created connected backend for symphony
Bot info for symphony: id=349026222366055, name=Dev Cert Bot 9150
Injected 1 connected backends into AgentCommand: ['symphony']

make lint passes. The test suite is 282 passed, 12 failed, and those twelve are ModuleNotFoundError: No module named 'claude_agent_sdk' in my environment — identical on an unmodified checkout, so unrelated to this change.

Docs updated: the credentials table gains the RSA row, the Symphony paragraph describes both presets, and the override example now shows a field neither preset covers rather than the RSA workaround.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.56%. Comparing base (c641775) to head (5a953b5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #105   +/-   ##
=======================================
  Coverage   84.56%   84.56%           
=======================================
  Files          44       44           
  Lines        4569     4569           
  Branches      337      337           
=======================================
  Hits         3864     3864           
  Misses        600      600           
  Partials      105      105           

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