Phase-aware summarization and microcompaction for long sessions κΈ΄ μΈμ μ μν λ¨κ³ μΈμ μμ½ λ° λ§μ΄ν¬λ‘μ»΄ν©μ
Long coding sessions generate large conversation histories that eventually exceed the context window. ROACH PI uses a two-layer approach to context management:
κΈ΄ μ½λ© μΈμ μ κ²°κ΅ μ»¨ν μ€νΈ μλμ°λ₯Ό μ΄κ³Όνλ λν κΈ°λ‘μ μμ±ν©λλ€. ROACH PIλ 컨ν μ€νΈ κ΄λ¦¬λ₯Ό μν΄ λ κ³μΈ΅ μ κ·Ό λ°©μμ μ¬μ©ν©λλ€:
Phase-aware custom compaction takes over during active workflows. When the context window fills up, instead of using the default summarizer, ROACH PI injects a specialized compaction prompt that is tailored to the current workflow phase.
λ¨κ³ μΈμ 컀μ€ν μ»΄ν©μ μ΄ νμ± μν¬νλ‘ μ€μ μλν©λλ€. 컨ν μ€νΈ μλμ°κ° κ½ μ°¨λ©΄ κΈ°λ³Έ μμ½κΈ°λ₯Ό μ¬μ©νλ λμ , ROACH PIλ νμ¬ μν¬νλ‘ λ¨κ³μ λ§μΆ€νλ νΉμ μ»΄ν©μ ν둬ννΈλ₯Ό μ£Όμ ν©λλ€.
The prompt starts with a critical directive that prevents the model from making tool calls during compaction:
ν둬ννΈλ μ»΄ν©μ μ€ λͺ¨λΈμ΄ λꡬλ₯Ό νΈμΆνμ§ λͺ»νκ² νλ μ€μ μ§μλ¬ΈμΌλ‘ μμν©λλ€:
The model is required to produce two XML blocks in its response:
λͺ¨λΈμ μλ΅μ λ κ°μ XML λΈλ‘μ μμ±ν΄μΌ ν©λλ€:
<analysis> β Chronological thought process analyzing the conversationλνλ₯Ό λΆμνλ μμ°¨μ μ¬κ³ κ³Όμ <summary> β The structured summary in the prescribed 9-section formatκ·μ λ 9κ° μΉμ
νμμ ꡬ쑰νλ μμ½
After compaction, the <analysis> block is stripped and only the formatted summary is retained in context.
μ»΄ν©μ
ν <analysis> λΈλ‘μ μ κ±°λκ³ νμνλ μμ½λ§ 컨ν
μ€νΈμ μ μ§λ©λλ€.
Every compaction summary follows this nine-section structure. The model is given an explicit example template to follow.
λͺ¨λ μ»΄ν©μ μμ½μ μ΄ 9κ° μΉμ ꡬ쑰λ₯Ό λ°λ¦ λλ€. λͺ¨λΈμ λͺ μμ μΈ μμ ν νλ¦Ώμ μ 곡λ°μ΅λλ€.
Compaction is phase-aware. When an active workflow is running, the compaction prompt is augmented with phase-specific instructions that tell the model what to preserve.
μ»΄ν©μ μ λ¨κ³λ₯Ό μΈμν©λλ€. νμ± μν¬νλ‘κ° μ€ν μ€μΌ λ, μ»΄ν©μ ν둬ννΈλ λͺ¨λΈμ΄ 보쑴ν΄μΌ ν λ΄μ©μ μλ €μ£Όλ λ¨κ³λ³ μ§μλ¬ΈμΌλ‘ 보κ°λ©λλ€.
| Phaseλ¨κ³ | Whenμμ | Survives Compactionμ»΄ν©μ ν μ μ§ |
|---|---|---|
idle |
DefaultκΈ°λ³Έ | Yes (no special handling)μ (νΉλ³ν μ²λ¦¬ μμ) |
clarifying |
During /clarify/clarify μ€ |
Yes (phase preserved)μ (λ¨κ³ μ μ§) |
planning |
During /plan/plan μ€ |
Yes (phase + goal preserved)μ (λ¨κ³ + λͺ©ν μ μ§) |
milestoneplanning |
During /plan --milestones/plan --milestones μ€ |
Yes (phase preserved)μ (λ¨κ³ μ μ§) |
reviewing |
During /review/review μ€ |
Yes (phase preserved)μ (λ¨κ³ μ μ§) |
ultrareviewing |
During /ultrareview/ultrareview μ€ |
Yes (phase preserved)μ (λ¨κ³ μ μ§) |
Each non-idle phase injects additional instructions into the compaction prompt, emphasizing what the model must preserve. For example, during planning, the prompt requires the summary to capture task progress, implementation decisions, and the current task state.
κ° λΉμ ν΄(non-idle) λ¨κ³λ μ»΄ν©μ
ν둬ννΈμ μΆκ° μ§μλ¬Έμ μ£Όμ
νμ¬ λͺ¨λΈμ΄ 보쑴ν΄μΌ ν λ΄μ©μ κ°μ‘°ν©λλ€. μλ₯Ό λ€μ΄, planning μ€μλ ν둬ννΈκ° μμ½μ μμ
μ§ν μν©, ꡬν κ²°μ , νμ¬ μμ
μνλ₯Ό ν¬ν¨νλλ‘ μꡬν©λλ€.
Microcompaction is a lightweight pre-compaction pass that replaces old tool results with short placeholders. This extends session lifetime by reducing token usage before a full compaction is triggered.
λ§μ΄ν¬λ‘μ»΄ν©μ μ μ€λλ λꡬ κ²°κ³Όλ₯Ό μ§§μ νλ μ΄μ€νλλ‘ κ΅μ²΄νλ κ²½λ μ¬μ μ»΄ν©μ ν¨μ€μ λλ€. μ 체 μ»΄ν©μ μ΄ νΈλ¦¬κ±°λκΈ° μ μ ν ν° μ¬μ©λμ μ€μ¬ μΈμ μλͺ μ μ°μ₯ν©λλ€.
A message is eligible for microcompaction when all of these conditions are met:
λ©μμ§λ λ€μ λͺ¨λ μ‘°κ±΄μ΄ μΆ©μ‘±λ λ λ§μ΄ν¬λ‘μ»΄ν©μ λμμ΄ λ©λλ€:
role === "toolResult"isError !== true (error results are never compacted)(μ€λ₯ κ²°κ³Όλ μ λ μ»΄ν©μ
λμ§ μμ)toolName is inμ΄ PI_TOOL_NAME_SET (known pi tools only)(μλ €μ§ pi λꡬλ§)MICROCOMPACT_AGE_MS (1 hour)(1μκ°)When compacted, the tool result content is replaced with:
μ»΄ν©μ λλ©΄ λꡬ κ²°κ³Ό μ½ν μΈ κ° λ€μμΌλ‘ κ΅μ²΄λ©λλ€:
Microcompaction is opt-in. It must be explicitly enabled via environment variable.
λ§μ΄ν¬λ‘μ»΄ν©μ μ μ΅νΈμΈμ λλ€. νκ²½ λ³μλ₯Ό ν΅ν΄ λͺ μμ μΌλ‘ νμ±νν΄μΌ ν©λλ€.
| Env Varνκ²½ λ³μ | DefaultκΈ°λ³Έκ° | Descriptionμ€λͺ |
|---|---|---|
PI_AGENTIC_MICROCOMPACTION |
(unset)(λ―Έμ€μ ) | Set to 1 to enable microcompaction1λ‘ μ€μ μ λ§μ΄ν¬λ‘μ»΄ν©μ
νμ±ν |
During plan execution (plan-compliance, plan-worker, plan-validator), the workflow phase and goal document are critical for continuity. If a compaction occurs mid-execution:
κ³ν μ€ν μ€(plan-compliance, plan-worker, plan-validator), μν¬νλ‘ λ¨κ³μ λͺ©ν λ¬Έμλ μ°μμ±μ μ€μν©λλ€. μ€ν μ€ μ»΄ν©μ
μ΄ λ°μνλ©΄:
This means a long-running plan execution will not lose track of its goal or phase even if multiple compactions occur.
μ¦, κΈ΄ κ³ν μ€ν μ€ μ¬λ¬ μ»΄ν©μ μ΄ λ°μν΄λ λͺ©νλ λ¨κ³λ₯Ό μμ§ μμ΅λλ€.