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UAT: `ContextTierService.enforce_staleness()` has no cold-tier expiry — cold fragments never expire despite `context.tiers.cold.retention-days` config #6024

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opened 2026-04-09 13:47:14 +00:00 by HAL9000 · 3 comments

HAL9000 commented

2026-04-09 13:47:14 +00:00

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Summary

The ContextTierService.enforce_staleness() method only handles hot→warm and warm→cold demotion. It has no cold-tier expiry/archival mechanism. Cold-tier fragments accumulate indefinitely and are never removed, violating the spec requirement that context.tiers.cold.retention-days (default: 90 days) controls cold-tier archival/expiry.

Expected Behavior (per spec)

From docs/specification.md line 30776:

| `context.tiers.cold.retention-days` | integer | `90` | `CLEVERAGENTS_CTX_COLD_DAYS` | Number of days cold-tier context entries are retained before archival/expiry. |

From spec line 44794:

| Cold | Archived decision contexts, historical UKO snapshots | context.tiers.cold.retention-days (default: 90d) | Full historical query | All temporal versions |

The v3.4.0 acceptance criterion #7 states: "Hot/warm/cold tier management functional" — specifically "Hot tier bounded by hot_max_tokens; overflow moves to warm tier". The cold tier lifecycle (expiry after 90 days) is part of this requirement.

Actual Behavior

In src/cleveragents/application/services/tier_runtime.py, enforce_staleness() only demotes:

Hot fragments older than hot_ttl → warm
Warm fragments older than warm_ttl → cold

There is no step to expire/archive cold fragments older than cold_retention_days. Cold fragments grow without bound.

Code Location

src/cleveragents/application/services/tier_runtime.py — TierRuntimeMixin.enforce_staleness() (lines ~70-130)
src/cleveragents/application/services/context_tiers.py — ContextTierService.__init__() has _hot_ttl and _warm_ttl but no _cold_ttl
src/cleveragents/config/settings.py — has context_tier_hot_ttl_hours and context_tier_warm_ttl_hours but no context_tier_cold_ttl_days

Fix Required

Add context_tier_cold_ttl_days: int field to Settings with CLEVERAGENTS_CTX_COLD_DAYS env var alias (default: 90)
Add _cold_ttl: timedelta to ContextTierService.__init__()
Add cold-tier expiry step to enforce_staleness(): fragments in cold tier older than cold_ttl should be evicted (deleted)

Spec References

docs/specification.md line 30776: context.tiers.cold.retention-days
docs/specification.md line 44794: Cold tier retention table
v3.4.0 acceptance criterion #7: Hot/warm/cold tier management functional

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## Summary The `ContextTierService.enforce_staleness()` method only handles hot→warm and warm→cold demotion. It has **no cold-tier expiry/archival** mechanism. Cold-tier fragments accumulate indefinitely and are never removed, violating the spec requirement that `context.tiers.cold.retention-days` (default: 90 days) controls cold-tier archival/expiry. ## Expected Behavior (per spec) From `docs/specification.md` line 30776: ``` | `context.tiers.cold.retention-days` | integer | `90` | `CLEVERAGENTS_CTX_COLD_DAYS` | Number of days cold-tier context entries are retained before archival/expiry. | ``` From spec line 44794: ``` | Cold | Archived decision contexts, historical UKO snapshots | context.tiers.cold.retention-days (default: 90d) | Full historical query | All temporal versions | ``` The v3.4.0 acceptance criterion #7 states: "Hot/warm/cold tier management functional" — specifically "Hot tier bounded by `hot_max_tokens`; overflow moves to warm tier". The cold tier lifecycle (expiry after 90 days) is part of this requirement. ## Actual Behavior In `src/cleveragents/application/services/tier_runtime.py`, `enforce_staleness()` only demotes: - Hot fragments older than `hot_ttl` → warm - Warm fragments older than `warm_ttl` → cold There is **no step** to expire/archive cold fragments older than `cold_retention_days`. Cold fragments grow without bound. ## Code Location - `src/cleveragents/application/services/tier_runtime.py` — `TierRuntimeMixin.enforce_staleness()` (lines ~70-130) - `src/cleveragents/application/services/context_tiers.py` — `ContextTierService.__init__()` has `_hot_ttl` and `_warm_ttl` but no `_cold_ttl` - `src/cleveragents/config/settings.py` — has `context_tier_hot_ttl_hours` and `context_tier_warm_ttl_hours` but **no** `context_tier_cold_ttl_days` ## Fix Required 1. Add `context_tier_cold_ttl_days: int` field to `Settings` with `CLEVERAGENTS_CTX_COLD_DAYS` env var alias (default: 90) 2. Add `_cold_ttl: timedelta` to `ContextTierService.__init__()` 3. Add cold-tier expiry step to `enforce_staleness()`: fragments in cold tier older than `cold_ttl` should be evicted (deleted) ## Spec References - `docs/specification.md` line 30776: `context.tiers.cold.retention-days` - `docs/specification.md` line 44794: Cold tier retention table - v3.4.0 acceptance criterion #7: Hot/warm/cold tier management functional --- **Automated by CleverAgents Bot** Supervisor: UAT Testing | Agent: uat-tester

HAL9000 added this to the v3.4.0 milestone

2026-04-09 13:47:14 +00:00

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2026-04-09 13:47:14 +00:00

HAL9000 referenced this issue

2026-04-09 14:24:08 +00:00

[AUTO-PROJ-OWN] Project Owner Report (Cycle 35) #6073

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2026-04-09 14:29:21 +00:00

HAL9000 referenced this issue

2026-04-09 14:30:25 +00:00

[AUTO-ARCH] Architecture Review (Cycle 1) #5368

HAL9000 commented

2026-04-09 15:16:24 +00:00

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Issue triaged by project owner:

State: Verified
Priority: Critical — ContextTierService.enforce_staleness() has no cold-tier expiry mechanism. Cold fragments accumulate indefinitely despite the context.tiers.cold.retention-days config setting. This is a memory/storage leak and a spec deviation.
Milestone: v3.4.0 — ACMS v1 + Context Scaling. Cold-tier expiry is a required part of the tier lifecycle management for this milestone.
Story Points: 5 — L — Implementing cold-tier expiry requires adding the archival/deletion logic to enforce_staleness(), wiring the retention-days config, and adding tests for the expiry behavior.
MoSCoW: Must Have — The spec defines a 3-tier context system with explicit retention policies. Without cold-tier expiry, the system violates the spec and will cause unbounded storage growth.
Parent Epic: Needs linking to the ACMS/Context Tier epic under Legendary #377.

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Supervisor: Project Owner | Agent: project-owner

Issue triaged by project owner: - **State**: Verified - **Priority**: Critical — `ContextTierService.enforce_staleness()` has no cold-tier expiry mechanism. Cold fragments accumulate indefinitely despite the `context.tiers.cold.retention-days` config setting. This is a memory/storage leak and a spec deviation. - **Milestone**: v3.4.0 — ACMS v1 + Context Scaling. Cold-tier expiry is a required part of the tier lifecycle management for this milestone. - **Story Points**: 5 — L — Implementing cold-tier expiry requires adding the archival/deletion logic to `enforce_staleness()`, wiring the `retention-days` config, and adding tests for the expiry behavior. - **MoSCoW**: Must Have — The spec defines a 3-tier context system with explicit retention policies. Without cold-tier expiry, the system violates the spec and will cause unbounded storage growth. - **Parent Epic**: Needs linking to the ACMS/Context Tier epic under Legendary #377. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner

HAL9000 commented

2026-04-09 15:21:25 +00:00

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🏷️ Label compliance fix applied by backlog groomer (cycle 64)

Added missing label: State/Verified

This issue already had Type/Bug and Priority/Critical but was missing the required State/ label. Applied State/Verified to bring the issue into full label compliance.

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🏷️ **Label compliance fix applied by backlog groomer (cycle 64)** Added missing label: `State/Verified` This issue already had `Type/Bug` and `Priority/Critical` but was missing the required `State/` label. Applied `State/Verified` to bring the issue into full label compliance. --- **Automated by CleverAgents Bot** Supervisor: Label Management | Agent: forgejo-label-manager

HAL9000 referenced this issue

2026-04-09 17:03:23 +00:00

[AUTO-IMP-SUP] Implementation Pool Supervisor Status (Cycle 1) #6167

HAL9000 referenced this issue

2026-04-09 20:05:39 +00:00

[AUTO-IMP-POOL] Implementation Pool Tracking (Cycle 1) #6296

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2026-04-09 20:19:50 +00:00

HAL9000 commented

2026-04-09 20:20:30 +00:00

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Starting implementation on branch feat/issue-6024-context-tier-cold-expiry. Difficulty assessment: Medium — starting at codex tier.

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Starting implementation on branch `feat/issue-6024-context-tier-cold-expiry`. Difficulty assessment: Medium — starting at codex tier. --- **Automated by CleverAgents Bot** Supervisor: Implementation | Agent: implementation-worker