[cemililik]

Fixes #102.

forgelm purge --row-id now warns about the weights a run really leaves behind. Until now data.erasure_warning_memorisation fired only for a literal <--output-dir>/final_model/, so an erasure exited 0 with no warning for: a default invocation (--output-dir omitted, so the corpus directory is used), a non-default training.final_model_dir, a run awaiting or refused human approval (its model exists only as <final_model_dir>.staging.<run_id>/), and a run whose auto-revert deleted the model but left checkpoint-*. The audit chain then recorded a completed erasure and a DPO could conclude no trained model held the data.

Follow-ups filed from this work: #1069 (retention horizon for checkpoint-*), #1070 (--check-policy and non-UTF-8 input), #1071 (exports are invisible to the memorisation check).

What changed

• forgelm/cli/subcommands/_purge.py
  • The scan reports the model directory, its <final_model_dir>.staging[.<run_id>] siblings and checkpoint-* under --output-dir (no config needed) and, with --config, under training, every pipeline stage's training block and merge.output_dir. The staging name is the one ForgeTrainer writes (trainer.py: f"{final_path}.staging.{run_id}").
  • The event gains memorisation_artefact_paths; affected_run_ids comes from staging names, else from the audit logs of the scanned layouts.
  • --run-id --kind staging and --check-policy take the staging directory name from training.final_model_dir (a full config only, for --check-policy; a retention:-only file keeps the default final_model).
  • Robustness, because this code runs after the row is already erased: a directory or audit log that cannot be read is logged and skipped, a non-UTF-8 --config counts as "cannot be loaded", and run mode reads the config before it logs data.erasure_requested.
• forgelm/cli/_config_load.py: _load_retention_and_config replaces _load_retention_policy and also returns the full config.
• Docs, EN + TR: audit event catalog, purge reference, configuration reference, GDPR guide and manual, QMS risk plan and incident SOP, deployer guide, design deviations, --config help. They state that no retention horizon covers checkpoint-* and that --row-id matches id/row_id only.
• Tests: 32 new test functions in tests/test_gdpr_erasure.py, built on the real trainer naming. Each fix is pinned by a test that fails without it.
• CHANGELOG.md (### Fixed, names the restored contract) and tools/check_module_size.py (_purge.py budget 1224 → 1304 with its budget_history entry, per decision C-18).

Findings of #102

Finding	Status
CR-A10-022 (memorisation warning looks only at <output_dir>/final_model)	Resolved here; the implicit---output-dir WARNING came with #1050
CR-A10-042 (checkpoints, staging, merge output)	Memorisation half resolved here. For retention, the finding allows documenting that checkpoints are outside it, which the docs now do; a real horizon is #1069, and exported models are #1071
DOC-D3B02-005 (--row-id matches the id field only)	Resolved here
DOC-D1B04-022 (catalog trigger wording)	Resolved here
TECH-T11-001, DOC-BLEGAL-024, DOC-BLEGAL-044, DOC-D3B02-021, DOC-D3B02-044, DOC-D3B02-048	Closed by #1050 (re-checked against the current text)

Decisions worth a look

1. Config-free scan. --output-dir is scanned for checkpoint-* and staging directories without --config too, because the issue's own failure scenario passes no config.
2. Symlinked entries are reported where they are named, not skipped: checkpoints are often symlinked to a scratch volume, the scan only stats and lists paths, and a dropped entry is a false "nothing found".
3. Run mode reads --config (only for final_model_dir). A config that cannot be loaded logs a WARNING and the purge continues with the default name, which fails loudly (NoMatchingArtefacts, exit 1) rather than deleting the wrong thing.
4. No retention horizon for checkpoint-* in this PR. It needs a new config field and purge --check-policy: add a retention horizon for checkpoint-* directories #1069 is still needs-triage.
5. Limits that remain, and are documented: models you export or copy outside the scanned directories are invisible to the check (purge memorisation check cannot see exported GGUF files: forgelm export records only a basename and no audit event #1071 tracks recording export destinations); without --output-dir the audit chain and salt still sit next to the corpus (the WARNING from fix(docs): align GDPR, erasure, retention and PII documentation with the code; harden the user-manual schema guard #1050 says so).

Verification

Full CLAUDE.md gauntlet on ab5ce5f (with PYTHONPATH pinned to the checkout; check_import_origin confirms it): pytest 6707 passed / 98 skipped, tools coverage gate, mypy strict, ruff, audit catalog 47↔47, bilingual parity and code blocks, anchors, CLI help, all doc guards, module size, bandit (warn-only, none in touched files). Every scenario above was also reproduced end to end through the forgelm purge CLI against the previous revision and this one, and each fix was reverted in turn to confirm a new test goes red. An independent review pass found five more issues (an --output-dir / final_model_dir pairing gap, two crashes after the erasure, stale docs, Turkish wording); all are fixed in this commit.

Summary by Sourcery

Make row erasure warnings cover the trained-weight artefacts that runs can actually leave behind.

New Features:

• Expand purge memorisation detection to report model, staging, checkpoint, pipeline-stage, and merge artefacts across configured training layouts.
• Include absolute memorisation artefact paths and improved affected-run identification in erasure warning events.
• Support configured non-default model directories for staging erasure and retention-policy reporting.

Bug Fixes:

• Ensure row erasure warns when trained weights remain in default, custom, staging, checkpoint, or merge locations instead of silently completing.
• Prevent unreadable directories, audit logs, and non-UTF-8 configuration files from aborting or falsely suppressing post-erasure warnings.
• Ensure purge matches row identifiers only through the documented id or row_id fields.

Enhancements:

• Refactor configuration loading to return both retention settings and the validated full configuration where available.
• Document checkpoint retention limitations, memorisation-scan coverage, custom staging paths, and row-id semantics in English and Turkish guidance.

Documentation:

• Update audit event, purge, configuration, GDPR, compliance, QMS, incident-response, and deployer documentation to reflect expanded artefact detection and configuration behavior.

Tests:

• Add comprehensive coverage for model, staging, checkpoint, pipeline, merge, symlink, unreadable, custom-directory, retention, and configuration-loading scenarios.

Chores:

• Update the changelog and module-size budget for the expanded purge implementation.

    

Summary by CodeRabbit

• New Features
  • Purge warnings now scan model, staging, and checkpoint directories in configured training, pipeline, and merge locations, as well as the output directory. Warning details include detected artifact paths and affected run IDs.
  • Staging purges and retention reports use the configured model directory name when available; retention-only configurations continue to use the default. Checkpoint directories are not included in retention reports.
• Documentation
  • Clarified that --row-id matches only row ID fields, not row text or line numbers. Updated purge and audit-event guidance, including the limits of detecting copied or exported models.

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Reviewer's Guide

This PR completes config-driven memorisation detection for row erasure by scanning configured training locations for checkpoint and staging artefacts, safely excluding symlink escapes, and exposing the discovered paths in the warning audit event; documentation, tests, changelog, and module-size budgeting are updated accordingly.

Sequence diagram for config-driven memorisation detection

sequenceDiagram
    participant Purge as Purge command
    participant Detector as _detect_warning_conditions
    participant Scanner as _scan_memorisation_artefacts
    participant Config as Loaded config
    participant FS as Training filesystem
    participant Audit as Audit event

    Purge->>Detector: _detect_warning_conditions()
    Detector->>Scanner: _scan_memorisation_artefacts(output_dir, config_loaded)
    Scanner->>FS: Check output_dir/final_model
    opt config_loaded
        Scanner->>Config: Read training.output_dir and training.final_model_dir
        Scanner->>FS: Scan roots for checkpoint-* and .staging.*
        FS-->>Scanner: Candidate entries
        Scanner->>FS: Resolve candidate paths with _resolves_within()
        FS-->>Scanner: Keep paths within scan root
    end
    Scanner-->>Detector: Sorted memorisation paths
    Detector->>Audit: Emit data.erasure_warning_memorisation with memorisation_artefact_paths

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File-Level Changes

Change	Details	Files
Expanded row-erasure memorisation warnings to detect config-defined training artefacts while enforcing symlink containment.	Retained the config-free <output_dir>/final_model check. Scanned loaded config training.output_dir and training.final_model_dir for checkpoint-* directories and .staging.* entries. Skipped artefacts whose resolved paths escape the configured scan root and deduplicated/sorted reported paths.	forgelm/cli/subcommands/_purge.py
Added discovered artefact paths to the memorisation warning audit-event contract and synchronized reference documentation.	Added memorisation_artefact_paths alongside existing warning payload fields. Updated English and Turkish purge references and the audit-event catalog.	docs/reference/audit_event_catalog.md docs/reference/purge_subcommand.md docs/reference/purge_subcommand-tr.md
Covered config-driven detection, backward compatibility, absence of artefacts, and symlink escape behavior with regression tests.	Verified checkpoint and staging detection and payload reporting. Verified config-free behavior remains limited to the literal final-model check. Verified no warning for clean configured directories and external symlink targets.	tests/test_gdpr_erasure.py
Documented the behavior change and adjusted the deferred module-size budget for the implementation.	Added an Unreleased changelog entry. Raised the _purge.py budget with a dated decision-history note.	CHANGELOG.md tools/check_module_size.py

Possibly linked issues

• #CR-A10-022: The PR extends purge warning detection to configured training directories, directly addressing CR-A10-022's missed-model warning, though some issue recommendations remain unaddressed.

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+---------------------------------+
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📝 Walkthrough

The purge command now scans model, staging, and checkpoint directories across default and configured layouts. It reports discovered artefact paths and affected run IDs. Run-scoped staging resolution and retention reporting use configured model-directory names when a full config is available.

Changes: Purge artefact checks and staging resolution

Layer / File(s)	Summary
Memorisation artefact scan forgelm/cli/subcommands/_purge.py, forgelm/cli/_config_load.py, tests/test_gdpr_erasure.py, docs/reference/*, docs/guides/*, docs/qms/*	The purge warning scans model, staging, and checkpoint-* directories under the output directory and configured training, pipeline, and merge layouts. Its payload includes discovered paths and affected run IDs. Tests cover configured layouts, scan failures, symlinks, audit-log run-ID discovery, and fallback behavior.
Configured staging and retention forgelm/cli/subcommands/_purge.py, forgelm/cli/_config_load.py, forgelm/config.py, tests/test_gdpr_erasure.py, docs/reference/*, docs/guides/*	Run-scoped staging resolution and retention reporting use configured model-directory names. Retention-only configs use the default final_model name. Checkpoint directories are not included in retention reporting.
Purge and row-ID guidance CHANGELOG.md, docs/design/gdpr_erasure.md, docs/usermanuals/*/compliance/*, docs/guides/iso_soc2_deployer_guide*, docs/qms/*	The documentation describes artefact scan scope and limitations, configuration-dependent staging behavior, and retention exclusions. It also clarifies that --row-id matches id or row_id, not row text or line numbers.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant Purge as forgelm purge
  participant Scanner as _scan_memorisation_artefacts
  participant Layouts as output and configured layouts
  participant Audit as audit logs
  participant Event as data.erasure_warning_memorisation
  Purge->>Scanner: scan for model, staging, and checkpoint directories
  Scanner->>Layouts: inspect directory layouts
  Layouts-->>Scanner: discovered artefact paths
  Scanner->>Audit: read approval events for affected run IDs
  Audit-->>Scanner: run IDs or unreadable-log result
  Scanner-->>Purge: artefact paths and affected run IDs
  Purge->>Event: record warning payload

Loading

Possibly related PRs

• HodeTech/ForgeLM#1061: This PR extends the purge warning and retention-only config work from that PR to configured layouts and model-directory names.
• HodeTech/ForgeLM#1058: This PR replaces the retention-only loader introduced there with a loader that also returns full configuration.

Suggested reviewers: chiragjangiir

Merge Risk: 🔵 Low · up to ab5ce

Auditors and event consumers may misunderstand what purge checks and how an unknown run is reported. Correct the reference rows; the remaining risk is bounded.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 67.74% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 62 functions across 6 files. (20 skipped:…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title clearly identifies the purge change and its purpose: finding artefacts left by a run. It is concise and related to the main changes.
Description check		The description is comprehensive. It covers the issue, implementation changes, documentation, tests, limitations, and verification results. It does not reproduce the template headings or complete the …
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description is comprehensive. It covers the issue, implementation changes, documentation, tests, limitations, and verification results. It does not reproduce the template headings or complete the Type and Checklist sections, but the core required information is present.

Full details: Docstring Coverage

Explanation

Docstring coverage is 67.74% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 62 functions across 6 files. (20 skipped: 20 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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Inline comments:
Review comments at @forgelm/cli/subcommands/_purge.py:
- Around line 472-476: Resolve relative final model directories against
training.output_dir before scanning, rather than against the current working
directory. Update the candidate construction in the loop using getattr(training,
"output_dir", None) and getattr(training, "final_model_dir", None), while
preserving the existing handling of absolute paths and directory checks.
- Around line 503-506: Update the exception handler in `_resolves_within` to
catch `RuntimeError` as well as `OSError` from `Path.resolve()`, returning
`False` for symlink loops so the scan skips those entries.

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Inline comments:
Review comments at @docs/reference/audit_event_catalog.md:
- Line 81: Update the data.erasure_warning_memorisation reference rows in all
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• CHANGELOG.md
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• docs/reference/purge_subcommand-tr.md
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• forgelm/cli/_config_load.py
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