config

Documentation

Overview

Package config loads Prism configuration from prism.yaml and environment.

Index

• Constants
• func ModelContextWindow(model string) int
• type Config
  • func Default() *Config
  • func LoadFromDir(dir string) (*Config, error)
  • func (c *Config) ContextWindow() int
  • func (c *Config) WithModel(model string) *Config

Constants

const (
	AgentModeMCP  = "mcp"  // MCP tools only (prism_query, prism_read, …)
	AgentModeCLI  = "cli"  // CLI via Bash only (prism query --format text, …)
	AgentModeBoth = "both" // MCP primary + CLI fallback (default)
)

AgentMode controls which steering instructions prism init writes.

Functions

func ModelContextWindow

func ModelContextWindow(model string) int

ModelContextWindow maps known model name substrings to their context window. Matching is case-insensitive prefix/substring to handle versioned IDs like "claude-sonnet-4-6" or "gpt-4o-2024-11-20" without exhaustive enumeration.

Types

type Config

type Config struct {
	GroveURL    string
	GroveBinary string
	// Model is the active AI model identifier. Empty means "auto" — Prism
	// will use whatever is reported by the MCP client at initialize time or
	// passed per-call. When empty, ContextWindow() returns a safe 200k
	// default that covers all current production models.
	Model             string
	Profile           string
	EmbeddingsBackend string // "tfidf" (only backend implemented today)
	MaxCacheFiles     int
	Port              int
	// AgentMode controls which steering instructions are written by prism init.
	// Valid values: "mcp", "cli", "both" (default).
	AgentMode string
}

Config holds the resolved Prism configuration.

func Default

func Default() *Config

Default returns config values with environment overrides applied. Model intentionally defaults to "" (auto-detect at runtime).

func LoadFromDir

func LoadFromDir(dir string) (*Config, error)

LoadFromDir looks for prism.yaml in dir and merges over Default(). Parser is intentionally minimal: KEY: VALUE per line, comments with '#'. This keeps Prism single-binary with no YAML dep.

func (*Config) ContextWindow

func (c *Config) ContextWindow() int

ContextWindow returns the total context window in tokens for the model. When Model is empty or unrecognised, returns a safe 200k default that is correct for all current Claude models and generous for others.

func (*Config) WithModel

func (c *Config) WithModel(model string) *Config

WithModel returns a shallow copy of the config with Model overridden. Use this for per-call effective context windows without mutating state.