Add daily memory files for per-day notes and context injection

[dylanneve1]

Summary

• Adds per-day memory files (~/.talon/workspace/memory/daily/YYYY-MM-DD.md) for the bot to write observations, learnings, corrections, and follow-ups throughout the day
• These are the bot's own notes — separate from raw conversation logs and the long-term memory.md
• The system prompt references the daily memory directory so the bot can read files on demand (not injected into the prompt, to preserve caching)

How it works

• Real-time: Bot can write to today's daily file during conversations via the Write tool
• Heartbeat (hourly): Reviews logs and updates today's daily memory via {{dailyMemoryFile}} template variable
• Dream (12h): Consolidates daily memories into memory.md for long-term storage via {{dailyMemoryDir}} template variable
• Cleanup: Daily memory files older than 30 days are pruned alongside conversation logs (timezone-aware, validated YYYY-MM-DD.md pattern)

Information lifecycle

Daily notes (short-term) → dream consolidation → memory.md (long-term) → daily files age out

Key design decisions

• Daily memory is referenced, not injected into the system prompt — avoids prompt bloat and preserves prompt caching
• All date computations are timezone-aware using toYMD() / todayAndYesterday() from time.ts
• Cleanup validates the YYYY-MM-DD.md filename pattern before deleting

Files changed (12)

• src/util/paths.ts — new dirs.dailyMemory constant
• src/util/time.ts — export toYMD() and todayAndYesterday()
• src/util/workspace.ts — create memory/daily/ directory on startup
• src/util/config.ts — reference daily memory dir in system prompt
• src/storage/daily-log.ts — timezone-aware 30-day cleanup for daily memory files
• src/core/heartbeat.ts — {{dailyMemoryFile}} template variable (timezone-aware)
• src/core/dream.ts — {{dailyMemoryDir}} template variable
• prompts/heartbeat.md — daily notes in default tasks
• prompts/dream.md — daily memory in consolidation stage
• src/__tests__/heartbeat.test.ts — updated path mock
• src/__tests__/dream.test.ts — updated path mock
• src/__tests__/daily-log.test.ts — daily memory cleanup tests

Test plan

• Type check passes
• Full test suite: 1284 tests passing across 43 files
• Prettier formatting clean
• Fully additive — zero breaking changes to existing memory system

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds a short-term “daily memory” layer (per-day markdown notes) alongside existing persistent memory.md, enabling heartbeat/dream agents to write daily summaries and injecting recent daily notes into the system prompt for better continuity.

Changes:

• Introduces dirs.dailyMemory and ensures workspace/memory/daily/ is created on startup.
• Injects today + yesterday daily notes into the assembled system prompt and documents the new daily note location in workspace instructions.
• Extends retention cleanup to prune daily memory files older than 30 days; wires template variables into heartbeat/dream prompts.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/util/paths.ts	Adds dirs.dailyMemory path constant for daily note storage.
src/util/workspace.ts	Ensures the daily memory directory exists during workspace initialization.
src/util/config.ts	Injects recent daily notes into the system prompt; updates workspace description.
src/storage/daily-log.ts	Extends startup cleanup to prune old daily memory files alongside logs.
src/core/heartbeat.ts	Adds {{dailyMemoryFile}} template variable to the heartbeat prompt.
src/core/dream.ts	Adds {{dailyMemoryDir}} template variable to the dream prompt.
prompts/heartbeat.md	Updates default heartbeat tasks to write to today’s daily memory file.
prompts/dream.md	Instructs dream consolidation to also write per-day daily memory summaries.
src/tests/heartbeat.test.ts	Updates mocked paths to include dailyMemory.
src/tests/dream.test.ts	Updates mocked paths to include dailyMemory across test cases.

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

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Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

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Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

src/util/time.ts:42

• todayAndYesterday() derives "yesterday" by subtracting a fixed 86_400_000ms. Around DST transitions (and other offset changes), “24h ago” is not guaranteed to be the previous calendar day in the configured timezone, which can mislabel timestamps and any callers relying on true day boundaries. Consider computing yesterday as the previous calendar date in the configured timezone (e.g., step backward until toYMD() changes, or use a timezone-aware date arithmetic approach) rather than subtracting a fixed millisecond interval.

export function todayAndYesterday(): { today: string; yesterday: string } {
  const now = new Date();
  const today = toYMD(now);
  const yd = new Date(now.getTime() - 86_400_000);
  const yesterday = toYMD(yd);
  return { today, yesterday };

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