Replaces LICENSE (GPLv3 -> AGPLv3) and prepends
`SPDX-License-Identifier: AGPL-3.0-or-later` to every source file
across decnet/, decnet_web/, tests/, scripts/, and tools/.
Rationale: closes the GPLv3 ASP loophole so any party operating a
modified DECNET as a network service must offer their modified
source. Personal copyright (Samuel Paschuan) + inbound=outbound
contributions make a future unilateral relicense infeasible.
- LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt)
- COPYRIGHT: project copyright notice
- tools/add_spdx_headers.py: idempotent header injector
(shebang- and PEP 263-aware)
Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh).
No behavior change; comments only.
Two operators cooperating on one campaign can share C2 endpoints +
stage-1 payloads while running distinct tooling — fixture 5
(multi_operator) is the canonical demonstration. The identity
clusterer must NOT fuse them: shared infra is a campaign-level
signal, not an identity-level one. The campaign clusterer (downstream
work) handles that grouping over identities.
Mechanism: when two observations have non-null fingerprints AND the
fingerprints fully disagree, the high-weight tier drops the payload
and C2 contributions to zero. JA3 / HASSH agreement still returns
1.0 directly — no veto applies when something agrees. Partial
agreement (one slot agrees, another disagrees) is treated as
agreement, since stable-tool partial overlap is more consistent
with one identity than two.
The veto only triggers when there is actual disagreement evidence —
two un-fingerprinted observations sharing a C2 still cluster, since
the absence of fingerprints is not the same as disagreement on them.
Fixture 5 production-clusterer assertion added at identity level:
ARI = 1.0, homogeneity = 1.0, exactly 2 predicted clusters from
2 truth identities. Phase-handoff edges (from the TODO) belong to
the downstream campaign clusterer, not this identity clusterer.
The clusterer now drops a single high-tier function call in favor of
a tier-weighted sum. Tier multipliers (high=1.0, medium=0.6, low=0.2,
very_low=0.05) are tuned so the threshold (1.0) admits high-tier
agreement alone while leaving every weaker tier — and every
combination of weaker tiers — under threshold.
Per-tier discipline tested:
- high alone clusters
- medium alone does NOT cluster (supporting signal only)
- low alone does NOT cluster (fixture 1's failure mode)
- very-low alone does NOT cluster (fixture 2's failure mode)
- all three weak tiers stacked still don't reach threshold
- high + medium clusters (high already saturates)
The combination is forward-compatible: low + very-low contributions
are computed today but always project to 0.0 because the production
adapter doesn't populate credentials / ASN-edge inputs into the
fixture path yet. Their contribution becomes load-bearing in commit 7
when the low-tier landing tightens the F1 / F2 bounds.
Fixture 4 (paused_campaign) ratchet added: high-tier signal carries
the multi-day-silence campaign into one identity. Time-agnostic
invariant — silence is irrelevant to the edge weight.
Adds the four weight-tier edge functions as pure, time-agnostic
scoring primitives over an Observation projection. Each returns a
score in [0, 1]; the connected-components impl will combine + threshold
in subsequent commits.
Tier semantics (from IDENTITY_RESOLUTION.md):
- high — JA3/HASSH/payload-hash/C2-endpoint exact match
- medium — phase-bucketed command-sequence Jaccard
- low — credential-attempt-set Jaccard (defeated alone by F1)
- very low — ASN equality (defeated alone by F2)
Time-agnostic invariant is a static test: Observation has no time
fields, so no edge function can silently start using them. Fixture 7
forbids recency-decay clustering on multi-month APT campaigns.
A from_synthetic() adapter projects SyntheticAttacker corpora into
Observation; the production-row adapter lands when the clusterer
starts reading the attackers table.
