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* Simulation API — dry-run compression to see what would happen.\n * Matches Python client.simulate() behavior.\n */\n\nimport { HeadroomClient } from \"./client.js\";\nimport type { HeadroomClientOptions } from \"./types.js\";\nimport type { SimulationResult } from \"./types/models.js\";\nimport type { HeadroomConfig } from \"./types/config.js\";\nimport { deepCamelCase, deepSnakeCase } from \"./utils/case.js\";\nimport { detectFormat, toOpenAI } from \"./utils/format.js\";\n\nexport interface SimulateOptions extends HeadroomClientOptions {\n model?: string;\n config?: HeadroomConfig;\n client?: HeadroomClient;\n}\n\n/**\n * Simulate compression without calling the LLM.\n * Shows what compression would do: token savings, transforms, waste signals.\n *\n * @example\n * ```typescript\n * const sim = await simulate(messages, { model: 'gpt-4o' });\n * console.log(`Would save ${sim.tokensSaved} tokens (${sim.estimatedSavings})`);\n * console.log('Transforms:', sim.transforms);\n * ```\n 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string;\n compressed: string;\n originalTokens: number;\n compressedTokens: number;\n agent: string | null;\n timestamp: number;\n transforms: string[];\n savingsPercent: number;\n}\n\nexport interface SharedContextStats {\n entries: number;\n totalOriginalTokens: number;\n totalCompressedTokens: number;\n totalTokensSaved: number;\n savingsPercent: number;\n}\n\nexport interface SharedContextOptions extends HeadroomClientOptions {\n model?: string;\n ttl?: number;\n maxEntries?: number;\n}\n\nexport class SharedContext {\n private entries = new Map();\n private client: HeadroomClient;\n private model: string;\n private ttl: number;\n private maxEntries: number;\n\n constructor(options: SharedContextOptions = {}) {\n const { model, ttl, maxEntries, ...clientOptions } = options;\n this.client = new HeadroomClient(clientOptions);\n this.model = model ?? \"claude-sonnet-4-5-20250929\";\n this.ttl = ttl ?? 3600;\n this.maxEntries = maxEntries ?? 100;\n }\n\n /**\n * Store content with 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null,\n timestamp: Date.now() / 1000,\n transforms: result.transformsApplied,\n savingsPercent:\n result.tokensBefore > 0\n ? ((result.tokensBefore - result.tokensAfter) / result.tokensBefore) *\n 100\n : 0,\n };\n\n this.entries.set(key, entry);\n return entry;\n }\n\n /**\n * Get content by key. Returns compressed by default, full original if full=true.\n */\n get(key: string, options?: { full?: boolean }): string | null {\n const entry = this.entries.get(key);\n if (!entry) return null;\n\n if (Date.now() / 1000 - entry.timestamp > this.ttl) {\n this.entries.delete(key);\n return null;\n }\n\n return options?.full ? entry.original : entry.compressed;\n }\n\n /**\n * Get full entry metadata.\n */\n getEntry(key: string): ContextEntry | null {\n const entry = this.entries.get(key);\n if (!entry) return null;\n\n if (Date.now() / 1000 - entry.timestamp > this.ttl) {\n this.entries.delete(key);\n return null;\n }\n\n return entry;\n }\n\n /**\n * List all stored keys (excluding expired).\n */\n keys(): string[] {\n this.evictExpired();\n return Array.from(this.entries.keys());\n }\n\n /**\n * Get aggregated statistics.\n */\n stats(): SharedContextStats {\n this.evictExpired();\n let totalOriginal = 0;\n let totalCompressed = 0;\n\n for (const entry of this.entries.values()) {\n totalOriginal += entry.originalTokens;\n totalCompressed += entry.compressedTokens;\n }\n\n const saved = totalOriginal - totalCompressed;\n return {\n entries: this.entries.size,\n totalOriginalTokens: totalOriginal,\n totalCompressedTokens: totalCompressed,\n totalTokensSaved: saved,\n savingsPercent: totalOriginal > 0 ? (saved / totalOriginal) * 100 : 0,\n };\n }\n\n /**\n * Clear all entries.\n */\n clear(): void {\n this.entries.clear();\n }\n\n private evictExpired(): void {\n const now = Date.now() / 1000;\n for (const [key, entry] of this.entries) {\n if (now - entry.timestamp > this.ttl) {\n this.entries.delete(key);\n }\n }\n }\n\n private evictIfFull(): void {\n while (this.entries.size >= this.maxEntries) {\n const oldest = this.entries.keys().next().value;\n if (oldest !== undefined) this.entries.delete(oldest);\n }\n }\n}\n","/**\n * Canonical filesystem contract for Headroom — parity shell for the npm SDK.\n *\n * The TypeScript SDK is an HTTP client today and does not touch the\n * filesystem directly. This module mirrors `headroom/paths.py` so that\n * future local features (e.g. cache/log co-location with the Python\n * proxy) land on the same contract.\n *\n * Two canonical roots:\n * - HEADROOM_CONFIG_DIR — read-mostly configuration\n * (default: ~/.headroom/config)\n * - HEADROOM_WORKSPACE_DIR — read-write state\n * (default: ~/.headroom)\n *\n * Precedence for every per-resource helper is:\n * explicit argument > per-resource env var > derived from canonical\n * root > default.\n *\n * Browser behavior: when `process` is not available (typeof process ===\n * \"undefined\"), all helpers return the empty string. Consumers running\n * in a browser should not call these helpers; they exist here so the\n * shape of the API matches Python's `headroom.paths` module.\n */\n\n// ---------------------------------------------------------------------------\n// Env var names\n// ---------------------------------------------------------------------------\n\nexport const HEADROOM_CONFIG_DIR_ENV = \"HEADROOM_CONFIG_DIR\";\nexport const HEADROOM_WORKSPACE_DIR_ENV = \"HEADROOM_WORKSPACE_DIR\";\n\nexport const HEADROOM_SAVINGS_PATH_ENV = \"HEADROOM_SAVINGS_PATH\";\nexport const HEADROOM_TOIN_PATH_ENV = \"HEADROOM_TOIN_PATH\";\nexport const HEADROOM_SUBSCRIPTION_STATE_PATH_ENV =\n \"HEADROOM_SUBSCRIPTION_STATE_PATH\";\n\n// ---------------------------------------------------------------------------\n// Node / browser guard (mirrors the pattern in client.ts::getEnv)\n// ---------------------------------------------------------------------------\n\nfunction isNode(): boolean {\n return (\n typeof process !== \"undefined\" &&\n typeof process.versions !== \"undefined\" &&\n typeof process.versions.node === \"string\"\n );\n}\n\nfunction getEnv(name: string): string {\n if (typeof process === \"undefined\" || !process.env) {\n return \"\";\n }\n const value = process.env[name];\n return typeof value === \"string\" ? value.trim() : \"\";\n}\n\nfunction homeDir(): string {\n if (!isNode()) {\n return \"\";\n }\n // Prefer the userInfo API, fall back to HOME / USERPROFILE env vars.\n try {\n // eslint-disable-next-line @typescript-eslint/no-var-requires\n const os = require(\"os\") as { homedir?: () => string };\n if (os.homedir) {\n const home = os.homedir();\n if (home) return home;\n }\n } catch {\n // ignore — fall back to env\n }\n return getEnv(\"HOME\") || getEnv(\"USERPROFILE\") || \"\";\n}\n\nfunction joinPath(...parts: string[]): string {\n if (!isNode()) {\n // Browser fallback — keep it simple, use forward slashes.\n return parts.filter((p) => p !== \"\").join(\"/\");\n }\n try {\n // eslint-disable-next-line @typescript-eslint/no-var-requires\n const path = require(\"path\") as {\n join?: (...p: string[]) => string;\n };\n if (path.join) return path.join(...parts.filter((p) => p !== \"\"));\n } catch {\n // ignore — fall back\n }\n const sep = process.platform === \"win32\" ? \"\\\\\" : \"/\";\n return parts.filter((p) => p !== \"\").join(sep);\n}\n\nfunction expandTilde(p: string): string {\n if (!p.startsWith(\"~\")) return p;\n const home = homeDir();\n if (!home) return p;\n if (p === \"~\") return home;\n if (p.startsWith(\"~/\") || p.startsWith(\"~\\\\\")) {\n return joinPath(home, p.slice(2));\n }\n return p;\n}\n\nfunction resolve(\n explicit: string | undefined,\n envVar: string,\n derived: string,\n): string {\n if (!isNode()) {\n // Browser fallback: no filesystem, return empty string.\n return \"\";\n }\n if (explicit !== undefined && explicit !== \"\") {\n return expandTilde(explicit);\n }\n const envValue = getEnv(envVar);\n if (envValue) {\n return expandTilde(envValue);\n }\n return derived;\n}\n\n// ---------------------------------------------------------------------------\n// Canonical roots\n// ---------------------------------------------------------------------------\n\nexport function workspaceDir(): string {\n if (!isNode()) return \"\";\n const envValue = getEnv(HEADROOM_WORKSPACE_DIR_ENV);\n if (envValue) return expandTilde(envValue);\n const home = homeDir();\n if (!home) return \"\";\n return joinPath(home, \".headroom\");\n}\n\nexport function configDir(): string {\n if (!isNode()) return \"\";\n const envValue = getEnv(HEADROOM_CONFIG_DIR_ENV);\n if (envValue) return expandTilde(envValue);\n const workspaceEnv = getEnv(HEADROOM_WORKSPACE_DIR_ENV);\n if (workspaceEnv) {\n return joinPath(expandTilde(workspaceEnv), \"config\");\n }\n const home = homeDir();\n if (!home) return \"\";\n return joinPath(home, \".headroom\", \"config\");\n}\n\n// ---------------------------------------------------------------------------\n// Per-resource helpers -- workspace bucket\n// ---------------------------------------------------------------------------\n\nexport function savingsPath(explicit?: string): string {\n return resolve(\n explicit,\n HEADROOM_SAVINGS_PATH_ENV,\n joinPath(workspaceDir(), \"proxy_savings.json\"),\n );\n}\n\nexport function toinPath(explicit?: string): string {\n return resolve(\n explicit,\n HEADROOM_TOIN_PATH_ENV,\n joinPath(workspaceDir(), \"toin.json\"),\n );\n}\n\nexport function subscriptionStatePath(explicit?: string): string {\n return resolve(\n explicit,\n HEADROOM_SUBSCRIPTION_STATE_PATH_ENV,\n joinPath(workspaceDir(), \"subscription_state.json\"),\n );\n}\n\nexport function memoryDbPath(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"memory.db\");\n}\n\nexport function nativeMemoryDir(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"memories\");\n}\n\nexport function licenseCachePath(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"license_cache.json\");\n}\n\nexport function sessionStatsPath(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"session_stats.jsonl\");\n}\n\nexport function syncStatePath(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"sync_state.json\");\n}\n\nexport function bridgeStatePath(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"bridge_state.json\");\n}\n\nexport function logDir(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"logs\");\n}\n\nexport function proxyLogPath(): string {\n if (!isNode()) return \"\";\n return joinPath(logDir(), \"proxy.log\");\n}\n\nexport function debug400Dir(): string {\n if (!isNode()) return \"\";\n return joinPath(logDir(), \"debug_400\");\n}\n\nexport function binDir(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"bin\");\n}\n\nexport function rtkPath(): string {\n if (!isNode()) return \"\";\n const name = process.platform === \"win32\" ? \"rtk.exe\" : \"rtk\";\n return joinPath(binDir(), name);\n}\n\nexport function deployRoot(): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"deploy\");\n}\n\nexport function beaconLockPath(port: number): string {\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), `.beacon_lock_${Math.trunc(port)}`);\n}\n\n// ---------------------------------------------------------------------------\n// Per-resource helpers -- config bucket\n// ---------------------------------------------------------------------------\n\nexport function modelsConfigPath(): string {\n if (!isNode()) return \"\";\n return joinPath(configDir(), \"models.json\");\n}\n\n// ---------------------------------------------------------------------------\n// Plugin-author entry points\n// ---------------------------------------------------------------------------\n\nfunction assertPluginName(name: string): void {\n if (!name || name.includes(\"/\") || name.includes(\"\\\\\")) {\n throw new Error(`invalid plugin name: ${JSON.stringify(name)}`);\n }\n}\n\nexport function pluginConfigDir(pluginName: string): string {\n assertPluginName(pluginName);\n if (!isNode()) return \"\";\n return joinPath(configDir(), \"plugins\", pluginName);\n}\n\nexport function pluginWorkspaceDir(pluginName: string): string {\n assertPluginName(pluginName);\n if (!isNode()) return \"\";\n return joinPath(workspaceDir(), \"plugins\", pluginName);\n}\n"]}