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Tyler King
2212f7f870 feat: remote SSH proxy mode 
Bascule now supports two session modes:
  Local — spawns a PTY on this machine (default, existing)
  Proxy — forwards the session to a target SSH host (NEW)

Proxy mode:
  SSH client ←→ bascule (auth + hooks) ←→ target SSH host
  Authenticates client via configured auth provider
  Connects to upstream SSH host via russh client
  Bridges I/O between client and upstream channels
  PTY, shell, and exec requests forwarded to target
  Exit status propagated back to client

Config:
  [proxy]
  target_host = "192.168.1.100"
  target_port = 22
  target_user = "deploy"           # optional, defaults to principal
  target_key_path = "/etc/bascule/target_key"
  accept_target_host_key = false   # dev only

SessionHandler hooks fire in both modes:
  on_session_start, on_exec, on_session_end
  Custom handlers can enforce policy regardless of mode

New file: proxy.rs (152 lines)
  UpstreamHandler — minimal russh client handler
  connect_upstream — connects + authenticates to target
  bridge_upstream_to_client — bidirectional I/O bridge

Binary: 6.3MB, zero substrate deps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-04-04 23:01:08 -04:00
Tyler King
02142f7be4 feat: Entra Agent ID auth provider + governance leak cleanup 
New crate: bascule-auth-agent-id
  Microsoft Entra Agent ID authentication for AI agents
  Validates OAuth tokens against Entra JWKS (60min cache)
  Extracts agent metadata: type, blueprint, sponsor, scopes
  Detects on-behalf-of (delegated) agents
  Token-as-password pattern for SSH auth

Cleanup:
  Removed all governance-specific references from comments
  SessionHandler trait is the only extension point
  Zero substrate/chronicle/gsap dependencies
  Config example uses neutral terminology

Config:
  [auth.agent_id] section for Entra configuration
  tenant_id, audiences, multi_tenant fields

3 crates: bascule-core, bascule-server, bascule-auth-agent-id
938 lines total, 5.6MB binary, 0 substrate deps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-04-04 22:35:32 -04:00
Tyler King
bfa26cfd15 feat: Bascule — identity-aware SSH proxy 
Open-source SSH proxy with pluggable authentication and
extensible session handling. Zero external governance dependencies.

Core (bascule-core):
  russh 0.46 SSH server with PTY bridge (portable-pty)
  Pluggable auth: AuthProvider trait (SSH keys, accept-all dev mode)
  SessionHandler trait for extending behavior (audit, governance)
  TOML configuration, ephemeral Ed25519 host key generation

Binary (bascule-server):
  Single binary, 5.6MB release build
  CLI with --config flag
  Default: accept-all auth on port 2222

Extension points:
  AuthProvider — implement for OIDC, certificates, custom auth
  SessionHandler — implement for audit, governance, recording
  DefaultHandler — passthrough (ships with open-source version)

Zero substrate/chronicle/gsap/hfl dependencies.
Apache 2.0 License.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-04-04 22:25:33 -04:00