refactor(hashline): change content separator from colon to pipe

Change LINE#HASH:content format to LINE#HASH|content across the entire
codebase. The pipe separator is more visually distinct and avoids
conflicts with TypeScript colons in code content.

15 files updated: implementation, prompts, tests, and READMEs.

src/tools/hashline-edit/diff-utils.ts

@@ -9,7 +9,7 @@ export function toHashlineContent(content: string): string {
 	const hashlined = contentLines.map((line, i) => {
 		const lineNum = i + 1
 		const hash = computeLineHash(lineNum, line)
-		return `${lineNum}#${hash}:${line}`
+		return `${lineNum}#${hash}|${line}`
 	})
 	return hasTrailingNewline ? hashlined.join("\n") + "\n" : hashlined.join("\n")
 }

src/tools/hashline-edit/edit-operations.test.ts

@@ -141,7 +141,7 @@ describe("hashline edit operations", () => {
     const lines = ["line 1", "line 2", "line 3"]
 
     //#when
-    const result = applySetLine(lines, anchorFor(lines, 2), "1#VK:first\n2#NP:second")
+    const result = applySetLine(lines, anchorFor(lines, 2), "1#VK|first\n2#NP|second")
 
     //#then
     expect(result).toEqual(["line 1", "first", "second", "line 3"])

src/tools/hashline-edit/edit-text-normalization.ts

@@ -1,4 +1,4 @@
-const HASHLINE_PREFIX_RE = /^\s*(?:>>>|>>)?\s*\d+\s*#\s*[ZPMQVRWSNKTXJBYH]{2}:/
+const HASHLINE_PREFIX_RE = /^\s*(?:>>>|>>)?\s*\d+\s*#\s*[ZPMQVRWSNKTXJBYH]{2}\|/
 const DIFF_PLUS_RE = /^[+](?![+])/
 
 function equalsIgnoringWhitespace(a: string, b: string): boolean {

src/tools/hashline-edit/hash-computation.test.ts

@@ -60,7 +60,7 @@ describe("computeLineHash", () => {
 })
 
 describe("formatHashLine", () => {
-  it("formats single line as LINE#ID:content", () => {
+  it("formats single line as LINE#ID|content", () => {
     //#given
     const lineNumber = 42
     const content = "const x = 42"
@@ -69,12 +69,12 @@ describe("formatHashLine", () => {
     const result = formatHashLine(lineNumber, content)
 
     //#then
-    expect(result).toMatch(/^42#[ZPMQVRWSNKTXJBYH]{2}:const x = 42$/)
+    expect(result).toMatch(/^42#[ZPMQVRWSNKTXJBYH]{2}\|const x = 42$/)
   })
 })
 
 describe("formatHashLines", () => {
-  it("formats all lines as LINE#ID:content", () => {
+  it("formats all lines as LINE#ID|content", () => {
     //#given
     const content = "a\nb\nc"
 
@@ -84,9 +84,9 @@ describe("formatHashLines", () => {
     //#then
     const lines = result.split("\n")
     expect(lines).toHaveLength(3)
-    expect(lines[0]).toMatch(/^1#[ZPMQVRWSNKTXJBYH]{2}:a$/)
-    expect(lines[1]).toMatch(/^2#[ZPMQVRWSNKTXJBYH]{2}:b$/)
-    expect(lines[2]).toMatch(/^3#[ZPMQVRWSNKTXJBYH]{2}:c$/)
+    expect(lines[0]).toMatch(/^1#[ZPMQVRWSNKTXJBYH]{2}\|a$/)
+    expect(lines[1]).toMatch(/^2#[ZPMQVRWSNKTXJBYH]{2}\|b$/)
+    expect(lines[2]).toMatch(/^3#[ZPMQVRWSNKTXJBYH]{2}\|c$/)
   })
 })
 

src/tools/hashline-edit/hash-computation.ts

@@ -13,7 +13,7 @@ export function computeLineHash(lineNumber: number, content: string): string {
 
 export function formatHashLine(lineNumber: number, content: string): string {
   const hash = computeLineHash(lineNumber, content)
-  return `${lineNumber}#${hash}:${content}`
+  return `${lineNumber}#${hash}|${content}`
 }
 
 export function formatHashLines(content: string): string {

src/tools/hashline-edit/hashline-edit-diff.ts

@@ -14,16 +14,16 @@ export function generateHashlineDiff(oldContent: string, newContent: string, fil
     const hash = computeLineHash(lineNum, newLine)
 
     if (i >= oldLines.length) {
-      diff += `+ ${lineNum}#${hash}:${newLine}\n`
+      diff += `+ ${lineNum}#${hash}|${newLine}\n`
       continue
     }
     if (i >= newLines.length) {
-      diff += `- ${lineNum}#  :${oldLine}\n`
+      diff += `- ${lineNum}#  |${oldLine}\n`
       continue
     }
     if (oldLine !== newLine) {
-      diff += `- ${lineNum}#  :${oldLine}\n`
-      diff += `+ ${lineNum}#${hash}:${newLine}\n`
+      diff += `- ${lineNum}#  |${oldLine}\n`
+      diff += `+ ${lineNum}#${hash}|${newLine}\n`
     }
   }
 

src/tools/hashline-edit/tool-description.ts

@@ -5,7 +5,7 @@ WORKFLOW:
 2. Pick the smallest operation per logical mutation site.
 3. Submit one edit call per file with all related operations.
 4. If same file needs another call, re-read first.
-5. Use anchors as "LINE#ID" only (never include trailing ":content").
+5. Use anchors as "LINE#ID" only (never include trailing "|content").
 
 VALIDATION:
   Payload shape: { "filePath": string, "edits": [...], "delete"?: boolean, "rename"?: string }

src/tools/hashline-edit/validation.test.ts

@@ -24,7 +24,7 @@ describe("parseLineRef", () => {
 
   it("accepts refs copied with markers and trailing content", () => {
     //#given
-    const ref = ">>> 42#VK:const value = 1"
+    const ref = ">>> 42#VK|const value = 1"
 
     //#when
     const result = parseLineRef(ref)
@@ -49,7 +49,7 @@ describe("validateLineRef", () => {
     const lines = ["function hello() {"]
 
     //#when / #then
-    expect(() => validateLineRef(lines, "1#ZZ")).toThrow(/>>>\s+1#[ZPMQVRWSNKTXJBYH]{2}:/)
+    expect(() => validateLineRef(lines, "1#ZZ")).toThrow(/>>>\s+1#[ZPMQVRWSNKTXJBYH]{2}\|/)
   })
 
   it("shows >>> mismatch context in batched validation", () => {
@@ -58,7 +58,7 @@ describe("validateLineRef", () => {
 
     //#when / #then
     expect(() => validateLineRefs(lines, ["2#ZZ"]))
-      .toThrow(/>>>\s+2#[ZPMQVRWSNKTXJBYH]{2}:two/)
+      .toThrow(/>>>\s+2#[ZPMQVRWSNKTXJBYH]{2}\|two/)
   })
 })
 
@@ -90,7 +90,7 @@ describe("legacy LINE:HEX backward compatibility", () => {
     const lines = ["function hello() {"]
 
     //#when / #then
-    expect(() => validateLineRef(lines, "1:ab")).toThrow(/>>>\s+1#[ZPMQVRWSNKTXJBYH]{2}:/)
+    expect(() => validateLineRef(lines, "1:ab")).toThrow(/>>>\s+1#[ZPMQVRWSNKTXJBYH]{2}\|/)
   })
 
   it("extracts legacy ref from content with markers", () => {

src/tools/hashline-edit/validation.ts

@@ -115,7 +115,7 @@ export class HashlineMismatchError extends Error {
 
       const content = fileLines[line - 1] ?? ""
       const hash = computeLineHash(line, content)
-      const prefix = `${line}#${hash}:${content}`
+      const prefix = `${line}#${hash}|${content}`
       if (mismatchByLine.has(line)) {
         output.push(`>>> ${prefix}`)
       } else {