Summary
DeepSeek TUI merged a cache-maximal context mode that injects full active file contents rather than relying only on path lists or summaries. The strategy is designed around DeepSeek-style cheap cached input, betting that stable repeated context can be cheaper and more reliable than aggressive summarization.
What changed
CodeWhale/DeepSeek TUI PR #3697 implemented an opt-in cache-maximal context mode.
Why it matters
Prompt cache behavior is becoming a product differentiator for coding agents. Tools that optimize around cached input can reduce effective cost and improve context fidelity during long sessions.
Evidence excerpt
Agents Radar described PR #3697 as implementing issue #528: an opt-in mode that injects full file contents instead of path lists as a cache-maximal strategy.