feat: AutoZero 通用 Agent 框架（从 AutoGo 五阶段拆分完成）
llm（三协议 Provider）/ session（JSONL 持久化）/ tools（Registry、围栏、 builtin、computer）/ cdp（browser）/ skills / mcp / agent（循环、两级压缩、 编排、审批门控）+ 底座 jsonl/textx/execx/diag/scratch/spill/imagecache。 产品装配代码（config 桥接、schedule 工具、memory/plan/retro/prompt） 留在 AutoGo，宿主接入方式见 MIGRATION.md。
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package tools
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import "strings"
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// editMatch 是 old_string 在文件内容里的一个字节区间 [start, end)。
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type editMatch struct {
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start int
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end int
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}
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// findEditMatches 按三级降级查找 old_string 的出现位置：
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//
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// 1. 精确匹配：字节完全一致，命中后不再降级；
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// 2. 字形归一：把弯引号、破折号、不间断空格等"看起来一样"的字符归一后匹配
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// （模型从网页/文档复制的文本经常带这些字符，精确匹配会失败）；
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// 3. 逐行降级：忽略每行行尾空白后再匹配，用来兜住"多了几个空格/少了几个空格"。
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//
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// 返回的区间始终指向**原文**，调用方据此替换，不会把归一化后的字符写回文件。
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func findEditMatches(content, old string) []editMatch {
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if old == "" {
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return nil
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}
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if matches := findExactMatches(content, old); len(matches) > 0 {
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return matches
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}
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if matches := findNormalizedMatches(content, old); len(matches) > 0 {
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return matches
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}
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return findLineMatches(content, old)
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}
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// findExactMatches 返回不重叠的精确出现位置（已是字节区间）。
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func findExactMatches(content, old string) []editMatch {
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var out []editMatch
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offset := 0
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for {
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i := strings.Index(content[offset:], old)
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if i < 0 {
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return out
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}
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start := offset + i
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out = append(out, editMatch{start: start, end: start + len(old)})
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offset = start + len(old)
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}
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}
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// findNormalizedMatches 在字形归一后的 rune 序列上匹配，再把 rune 下标映射回
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// 原始字节区间。归一化是逐 rune 的一对一替换，所以下标可以直接对应。
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func findNormalizedMatches(content, old string) []editMatch {
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contentRunes := []rune(content)
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oldRunes := []rune(old)
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if len(oldRunes) == 0 || len(oldRunes) > len(contentRunes) {
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return nil
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}
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prefix := runeByteOffsets(contentRunes)
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var out []editMatch
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for i := 0; i+len(oldRunes) <= len(contentRunes); i++ {
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match := true
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for j := range oldRunes {
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if normalizeEditRune(contentRunes[i+j]) != normalizeEditRune(oldRunes[j]) {
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match = false
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break
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}
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}
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if !match {
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continue
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}
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out = append(out, editMatch{start: prefix[i], end: prefix[i+len(oldRunes)]})
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i += len(oldRunes) - 1
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}
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return out
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}
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// findLineMatches 逐行比较（忽略行尾空白与字形差异），返回整行窗口的字节区间。
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// old 带结尾换行时连同最后一行的换行一起替换；不带时保留原文换行。
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func findLineMatches(content, old string) []editMatch {
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trailingNewline := strings.HasSuffix(old, "\n")
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expected := strings.Split(old, "\n")
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if trailingNewline {
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expected = expected[:len(expected)-1]
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}
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if len(expected) == 0 {
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return nil
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}
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lines := splitLines(content)
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var out []editMatch
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for i := 0; i+len(expected) <= len(lines); i++ {
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matched := true
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for j := range expected {
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if normalizeEditLine(lines[i+j].text) != normalizeEditLine(expected[j]) {
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matched = false
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break
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}
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}
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if !matched {
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continue
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}
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last := lines[i+len(expected)-1]
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end := last.end
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if !trailingNewline {
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end = last.contentEnd
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}
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if len(out) > 0 && out[len(out)-1].end > lines[i].start {
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continue // 与上一个命中重叠：同一个位置只算一次
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}
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out = append(out, editMatch{start: lines[i].start, end: end})
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i += len(expected) - 1
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}
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return out
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}
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type lineSpan struct {
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start int
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end int // 含换行
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contentEnd int // 不含 \r\n / \n
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text string
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}
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// splitLines 切出每一行及其字节区间。空内容返回空切片；末尾换行不产生空行。
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func splitLines(s string) []lineSpan {
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var out []lineSpan
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for start := 0; start < len(s); {
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i := strings.IndexByte(s[start:], '\n')
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if i < 0 {
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contentEnd := len(s)
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if contentEnd > start && s[contentEnd-1] == '\r' {
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contentEnd--
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}
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out = append(out, lineSpan{start: start, end: len(s), contentEnd: contentEnd, text: s[start:contentEnd]})
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break
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}
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end := start + i + 1
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contentEnd := end - 1
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if contentEnd > start && s[contentEnd-1] == '\r' {
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contentEnd--
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}
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out = append(out, lineSpan{start: start, end: end, contentEnd: contentEnd, text: s[start:contentEnd]})
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start = end
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}
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return out
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}
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// runeByteOffsets 返回每个 rune 起始处的字节偏移，外加末尾哨兵。
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func runeByteOffsets(runes []rune) []int {
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out := make([]int, len(runes)+1)
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offset := 0
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for i, r := range runes {
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out[i] = offset
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offset += len(string(r))
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}
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out[len(runes)] = offset
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return out
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}
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// normalizeEditRune 把视觉上等价、字节上不同的字符归一。
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func normalizeEditRune(r rune) rune {
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switch r {
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case '‘', '’', '‚', '‛':
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return '\''
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case '“', '”', '„', '‟':
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return '"'
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case '‐', '‑', '‒', '–', '—', '―', '−', '－':
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return '-'
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case '\u00A0', '\u2002', '\u2003', '\u2004', '\u2005', '\u2006', '\u2007', '\u2008',
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'\u2009', '\u200A', '\u202F', '\u205F', '\u3000':
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return ' '
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}
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return r
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}
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func normalizeEditLine(line string) string {
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line = strings.TrimRight(line, " \t\r")
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return string([]rune(normalizeEditTextRunes(line)))
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}
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func normalizeEditTextRunes(s string) []rune {
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out := []rune(s)
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for i := range out {
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out[i] = normalizeEditRune(out[i])
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}
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return out
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}
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// applyEditMatches 从后往前替换，前面的偏移因此不受影响。
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// 替换文本沿用命中区域的换行风格：命中区是 CRLF 而 new 用 LF 时，自动转成 CRLF，
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// 避免一次编辑把整个文件的行尾改掉。
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func applyEditMatches(content string, matches []editMatch, newText string) string {
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updated := content
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for i := len(matches) - 1; i >= 0; i-- {
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m := matches[i]
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region := content[m.start:m.end]
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replacement := newText
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if strings.Contains(region, "\r\n") && !strings.Contains(replacement, "\r\n") {
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replacement = strings.ReplaceAll(replacement, "\n", "\r\n")
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}
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updated = updated[:m.start] + replacement + updated[m.end:]
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}
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return updated
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}
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