Add temporal-core: research-backed temporal awareness plugin

[Evanyuan-builder]

Summary

Adds temporal-core to the All Plugins table — a small Apache-2.0 plugin that gives Claude Code agents a sense of time passing within a session.

What it does

Three hooks inject elapsed-time signals into the agent's context:

• SessionStart → records session start timestamp
• UserPromptSubmit → injects [temporal-core] session elapsed: 12m 34s
• PreToolUse → injects [temporal-core] since last action: 47s

A bundled temporal-awareness skill (SKILL.md) teaches the agent how to use the signals — pacing decisions, deadline-aware prioritization, recency reasoning, honest "how long did this take?" answers.

Why

Aher et al. (2026), Real-Time Deadlines Reveal Temporal Awareness Failures in LLM Strategic Dialogues, found that surfacing remaining time boosted LLM negotiation acceptance odds 6×. temporal-core is the minimal implementation of that finding for Claude Code.

Verified

• Plugin loads via claude --plugin-dir ✓
• UserPromptSubmit hook fires and additionalContext reaches the agent ✓ (verified in headless claude -p session: agent quoted the injected [temporal-core] session elapsed: 1s fragment unprompted)
• Apache-2.0, zero runtime deps (just jq, gracefully no-ops if missing)

Repo

• https://github.com/Evanyuan-builder/temporal-core
• v0.1.0 release: https://github.com/Evanyuan-builder/temporal-core/releases/tag/v0.1.0

Summary by CodeRabbit

• Documentation
  • Added "temporal-core" plugin entry to the plugins catalog, documenting its time-awareness features and available hooks.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c284259a-2c38-4ffb-af05-0b871f83c26a

📥 Commits

Reviewing files that changed from the base of the PR and between 659efb0 and 00761e6.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

A single entry for the temporal-core plugin is added to the README's "All Plugins" table. The entry documents the plugin's time-awareness features via specific hooks.

Changes

Plugin Registry Update

Layer / File(s)	Summary
Plugin Documentation README.md	temporal-core plugin entry added to All Plugins table describing time-awareness capabilities via specific hooks.

Estimated Code Review Effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly Related PRs

• rohitg00/awesome-claude-code-toolkit#117: Adds a single new plugin row to the same README All Plugins table.
• rohitg00/awesome-claude-code-toolkit#120: Also modifies the All Plugins table by adding new plugin entries.
• rohitg00/awesome-claude-code-toolkit#295: Adds a time-awareness plugin entry (idle-timing) to the same All Plugins table with similar hook-based timing features.

Poem

🐰 Tick-tock, the temporal's in place,
Time-awareness joins the plugin race,
With hooks that catch each fleeting tick,
The registry grows—oh so quick! ⏰

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding a new plugin called 'temporal-core' that provides temporal awareness features to Claude Code agents.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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