Cut Agent Token Costs: Caching, Routing & Budget Guards

The problem

Agentic workflows and long-lived LLM sessions generate massive token overhead because the entire conversation history is resent every turn. Developers often pay for redundant context, bloated system instructions, and verbose model outputs that provide no technical value.

What it does

• Optimizes input context by enforcing line-range reads, grep-first searching, and eliminating redundant file loading.
• Implements prompt caching strategies by structuring stable prefixes and preventing dynamic value injection in static blocks.
• Reduces output costs through terse response templates, diff-based file editing, and structured data enforcement.
• Automates session hygiene with context compaction thresholds and budget-aware model routing scripts.
• Minimizes context bloat using subagent delegation for bulk data processing and summarization.

Frameworks & tools

Claude Code, Cursor, LangChain, shell scripts for context guarding and usage logging.

Why this beats prompting it yourself

Manual cost-saving efforts are inconsistent and easily forgotten during deep work. This skill provides a systematic framework of automation scripts, cost-math references, and pre-built templates that force efficient token usage at the architectural level rather than just asking the model to "be brief."

Use cases

• Reducing the cost of long-lived debugging sessions in IDE-based agents.
• Building cost-efficient multi-agent pipelines where subagents handle high-volume data.
• Optimizing CI/CD agents that process large codebases or logs without blowing the budget.
• Implementing automated budget alerts and model downgrading for high-frequency API usage.

Known limitations

Requires specific platform support for prompt caching and token usage monitoring to be fully effective. Compaction and clearing sessions may result in the loss of non-essential conversation history.