// Package presetcoding provides the Claude Code-style prompt preset for
// Flyto Agent. It is the first concrete implementation of the promptkit
// three-layer pattern (static base + conditional sections + runtime
// reminders), mirroring the public mechanism Anthropic's Claude Code CLI
// uses internally.
//
// preset-coding 包提供 Flyto Agent 的 Claude Code 风格 prompt 预设. 它是
// promptkit 三层模式 (静态基座 + 条件块 + 运行时 reminder) 的第一个具体
// 实现, mirror Anthropic Claude Code CLI 内部使用的公开机制.
//
// # ELEVATED — Product positioning pivot anchor
//
// Flyto Agent transitions from "Claude Code re-implemented in Go" to
// "neutral transport + pluggable prompt framework + multi-preset
// ecosystem" (see ADR-0005 § 1.5). This package is the physical evidence
// of the pivot — all Claude Code-style content (8-section coding
// protocol, 23 builtin tools, FLYTO.md loader, env_info, git status
// snapshot, MCP server instructions) moves out of core/pkg/engine and
// core/pkg/context into here, exposed through promptkit.PromptBundle, no
// longer hardcoded inside the engine.
//
// Flyto Agent 从 "Claude Code 在 Go 的再造" 转向 "中性 transport + 可插拔
// prompt framework + 多 preset 共生体系" (见 ADR-0005 § 1.5). 本包是这个
// 转向的物理证据 — Claude Code 风格的所有内容 (8 段编程协议 / 23 个 builtin
// 工具 / FLYTO.md 加载器 / env_info / git status snapshot / MCP server
// instructions) 从 core/pkg/engine 和 core/pkg/context 搬到这里, 通过
// promptkit.PromptBundle 接口暴露, 不再 hardcoded 于引擎内部.
//
// # Layout (incremental, populated across ADR-0005 commit chain C2-C8)
//
//	base.go             6 always-on sections (cc Layer 1). Cache-stable
//	                    prefix. Populated by C3.
//	                    始终在的 6 段, cache 稳定前缀, C3 落.
//
//	conditional/        Sections evaluated once at session setup
//	  git.go            (cc Layer 2). C2-C4 落:
//	  mcp.go              git.go: 检测到 git 仓库才加 git status
//	  flyto_md.go         mcp.go: 配 MCP server 才加 instructions
//	  env_info.go         flyto_md.go: 找到 FLYTO.md 才加 (C2)
//	  memory.go           env_info.go: cwd / platform / date (C2)
//	                      memory.go: 启用 memory 才加
//
//	reminders/          Runtime triggers injected to user message
//	  triggers.go       (cc Layer 3). C7 落. Reminder lives outside
//	  inject.go         system prompt to preserve cache stability.
//	                    user message 中的运行时 reminder 注入, 不进
//	                    system prompt 保持 cache 稳定, C7 落.
//
//	builtins.go         AllBuiltins(deps) re-exports the 23 builtin
//	                    tools from core/pkg/tools/builtin. Caller wires
//	                    via cfg.Toolset Allowlist. C5 落.
//	                    re-export 23 builtin 工具供 cfg.Toolset 选用.
//
//	bundle.go           Implements promptkit.PromptBundle composing
//	                    base + conditional + reminders. C5.6 落.
//	                    实现三层装配, C5.6 落.
//
//	register.go         Public Register(reg) entrypoint for callers
//	                    wanting the cc-style preset wired in. C5.6 落.
//	                    一行启用编程预设的入口.
//
// # Anti-pattern this package replaces
//
// Pre-ADR-0005 the engine baked Claude Code's coding-assistant content
// directly into core/pkg/engine and core/pkg/context: 8-section system
// prompt unconditionally injected (~16KB), 23 builtin tools auto-registered
// when cfg.Tools=nil, FLYTO.md auto-loaded even when SystemPrompt
// ostensibly overridden, sub-agents inheriting parent bundle without
// explicit opt-in. r17 dump (FLYTO_DUMP_PAYLOAD=1, work-tree only)
// confirmed: probe configured 1 tool + 6KB system prompt, engine actually
// sent 25 tools + 22KB. This package is the destination for those moved
// concerns. Full 18-bug audit: ADR-0005 § 1.4.
//
// ADR-0005 之前引擎硬塞 Claude Code 内容于 core/pkg/engine 和 core/pkg/context:
// 8 段 system prompt 无条件注 (~16KB) / cfg.Tools=nil 自动 23 工具 / FLYTO.md
// 即使 SystemPrompt 名义覆盖也偷加 / sub-agent 继承父 bundle 不需显式 opt-in.
// r17 dump 实测: probe 配 1 工具 + 6KB, 引擎实发 25 + 22KB. 本包是上述被搬出
// 内容的归宿. 完整 18 bug 见 ADR-0005 § 1.4.
//
// # See also
//
//   - ADR-0005 (core/docs/adr/0005-engine-neutralization.md) —
//     decision rationale + 22 commit chain.
//   - core/pkg/promptkit/ — three-layer framework interface;
//     this package is its first implementation.
//   - core/extra/preset-extraction/ (future) — second implementation
//     for logistics quote extraction; will validate framework interface
//     correctness via rule-of-two.
package presetcoding