Replace the monolithic preamble string with Preamble struct — an
ordered list of named sections joined on demand. Updates are simple
Set() calls; no marker-based string splicing.
Changes:
- Delete prompts/tool_discovery.md (content already in system_prompt.md)
- Reduce prompts/ package to just the embed + ResolveSystemPrompt
- Replace buildPreamble() with direct section construction
- Replace refreshToolListing() 90-line string surgery with one Set()
- Replace SetCWD string.ReplaceAll with env section rebuild
- Remove RenamePreamble (was a no-op; session ID is a template var)
- Export EnvironmentBlock() for session setup
- All callers use PreambleString() instead of raw string field
The agent always talks to a *Conn (never a *Server directly).
Replace the Runner interface with the concrete type throughout:
- Runtime.ToolServer is now *toolsrv.Conn
- BuildRuntime takes *toolsrv.Conn
- session.Config, SessionInfra, InfraConfig use *toolsrv.Conn
- All inline type assertions in agent.go deleted — methods called
directly on *Conn (SetEnv, SetCWD, Close, Detach, ListDetachedRaw,
SignalDetached, GetDetachedOutput, DismissDetached, SetAllowTools,
SetOnToolsChanged, Ping, ToolRegistryRevision)
- Added Conn.ToolRegistryRevision() that returns 0 (remote connections
don't support revision tracking; use push-based OnToolsChanged instead)
- Deleted the Runner interface and its test
- Renamed LoadToolOnRunner → LoadToolOnConn
Ollie Agent
Levi Neely