---
phase: 11-notification-formatting
plan: 01
subsystem: telegram-formatting
tags: [swift, telegram-html, markdown, fence-chunking, file-ref-wrapping]

requires:
  - phase: 06-telegram-bot
    provides: TelegramFormatter basic escapeHtml and chunkTelegramHtml

provides:
  - renderSessionNotification() for session-end Telegram messages
  - markdownToTelegramHtml() with file reference wrapping
  - chunkTelegramHtml() with fence close/reopen across chunks
  - stripMetaTags() and stripSkillExpansion() for prompt cleaning
  - projectName() and formatDuration() utility functions
  - SessionNotificationData struct

affects: [11-02-notification-wiring, telegram-bot, prompt-executor]

tech-stack:
  added: [NSRegularExpression for HTML tag walking]
  patterns: [HTML tag nesting depth tracker for safe file-ref wrapping]

key-files:
  created: []
  modified:
    - plugins/claude-tts-companion/Sources/claude-tts-companion/TelegramFormatter.swift

key-decisions:
  - "Used NSRegularExpression for HTML tag walking (wrapFileReferencesInHtml) since Swift regex requires iOS 16/macOS 13 minimum"
  - "pickSafeBreakIndex scans forward (matching TS) instead of backward (original Swift) for consistent last-match semantics"

patterns-established:
  - "File ref wrapping runs AFTER markdown->HTML conversion to avoid corrupting attributes"
  - "Fence close/reopen in chunkMarkdownText preserves code block context across message splits"

requirements-completed: [FMT-01, FMT-02, FMT-04, FMT-05, FMT-06]

duration: 3min
completed: 2026-03-26
---

# Phase 11 Plan 01: Notification Formatting Summary

**Full legacy TypeScript formatting pipeline ported to TelegramFormatter.swift with renderSessionNotification, meta-tag stripping, file-ref wrapping, and fence-aware chunking with close/reopen**

## Performance

- **Duration:** 3 min
- **Started:** 2026-03-26T23:38:32Z
- **Completed:** 2026-03-26T23:41:40Z
- **Tasks:** 1
- **Files modified:** 1

## Accomplishments

- Ported renderSessionNotification() producing pipe-separated header (project, path, session ID, branch, duration, turns)
- Added stripMetaTags() removing 6 Claude Code meta-tag patterns and stripSkillExpansion() for skill-injected content
- Added wrapFileReferencesInHtml() with HTML tag nesting depth tracker, wrapping .md/.py/.go/.sh/.pl/.am/.at/.be/.cc in code tags
- Upgraded chunkTelegramHtml() with fence close/reopen when splitting inside code blocks
- Fixed findFenceSpanAt() boundary condition to use strict > on start matching legacy TS

## Task Commits

Each task was committed atomically:

1. **Task 1: Add renderSessionNotification, meta-tag stripping, file ref wrapping, and enhanced chunking** - `0e6129f2` (feat)

## Files Created/Modified

- `plugins/claude-tts-companion/Sources/claude-tts-companion/TelegramFormatter.swift` - Complete formatting engine with legacy feature parity (424 -> 479 lines)

## Decisions Made

- Used NSRegularExpression for the HTML tag walker in wrapFileReferencesInHtml since Swift Regex requires macOS 13+
- pickSafeBreakIndex refactored to scan forward (matching TS lastNewline/lastWhitespace semantics) instead of backward scan

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] stripMetaTags system-reminder regex needed dotMatchesLineSeparators**

- **Found during:** Task 1
- **Issue:** Swift's `.regularExpression` option on String does not support `[\s\S]*?` for multiline matching the way JavaScript does
- **Fix:** Used NSRegularExpression with `.dotMatchesLineSeparators` option for the system-reminder pattern
- **Files modified:** TelegramFormatter.swift
- **Verification:** swift build succeeds
- **Committed in:** 0e6129f2

---

**Total deviations:** 1 auto-fixed (1 bug)
**Impact on plan:** Necessary for correctness of multiline regex matching. No scope creep.

## Issues Encountered

None

## Known Stubs

None -- all functions are fully implemented with no placeholder data.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- TelegramFormatter now has full formatting engine ready for Plan 02 to wire into the bot notification pipeline
- SessionNotificationData struct defined for Plan 02's notification watcher to populate

---

_Phase: 11-notification-formatting_
_Completed: 2026-03-26_
