CC v2.1.122: System Prompt Removals, Debugging Update, and Schedule Confidence Boost
Claude Code CC v2.1.122 ships several system prompt and workflow changes. Here's what changed and what it means for your agent.
Removed: Standalone Phase-Four Plan-Mode Prompt
The dedicated phase-four prompt in plan mode has been removed. Instead, the active plan-mode reminder now embeds phase-four instructions via its own template placeholder. This simplifies the prompt chain and avoids duplication.
Skill: Debugging — Issue Description Integration
The debugging skill now prepends the provided issue description before the Issue section in its output. If the user doesn't describe a specific problem, the daemon debug context supplies a fallback issue guidance. This means fewer empty issue sections and more contextual debugging suggestions.
System Prompt: Proactive Schedule Offer Threshold Raised
The confidence bar for offering /schedule follow-ups has been raised from 70%+ to 85%+ odds the user will say yes. This reduces false-positive schedule offers where the agent incorrectly assumed the user wanted a follow-up.
System Reminder: New Diagnostics Format
Previously, the system reminder only inserted a precomputed diagnostics summary. Now it formats diagnostics dynamically from the diagnostics list, which should reflect more current system state.
System Reminder: Plan Mode Active (5-Phase) — Placeholder Change
The phase-four function hook in the 5-phase plan mode workflow has been replaced with a direct phase-four-instructions placeholder, aligning with the removal of the standalone prompt.
These changes are live in CC v2.1.122. Users running agentic workflows should verify that custom prompt templates referencing the old hook or standalone prompt still work.
📖 Read the full source: r/ClaudeAI
👀 See Also
Greg Kroah-Hartman's Clanker T1000: Local LLM on Framework Desktop with AMD Ryzen AI Max Fuzzing Linux Kernel Bugs
Greg KH's 'gregkh_clanker_t1000' uses a local LLM running on a Framework Desktop (AMD Ryzen AI Max+) to fuzz the Linux kernel, resulting in ~20 merged patches since April 7 fixing bugs in ALSA, HID, SMB, Nouveau, IO_uring, and more.
OpenAI Training Costs Projected to Exceed Anthropic's by 4-5 Times Annually
According to confidential financials reported by the Wall Street Journal, OpenAI expects to spend 4-5 times more on training than Anthropic each year for the next five years. The expense scale is described as mind-boggling.
Fine-tuning Phi-4-mini by training only LayerNorm parameters fails to improve performance
A hobbyist tested training only LayerNorm γ values on Phi-4-mini across Python and medical domains with different learning rates and data formats. Performance degraded slightly on all benchmarks compared to baseline, with the author concluding transformers already route information dynamically through attention.
Claude Code v2.1.150 Adds Remote System Prompt Injection via Network
Claude Code v2.1.150 fetches system prompts from Anthropic servers at startup and every 60 seconds via a GrowthBook feature flag, allowing remote injection—bypassed with CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1.